gnuplot-info — For questions and discussion about gnuplot

Re: [Gnuplot-info] set xrange from variable

[Thomas S. <t.s...@fz...>]

oh, sorry, that's a mistake, 07 *is* a valid octal


stevecoh1 wrote:
> 
> 07 is not valid octal?
> 
> Thomas Sefzick wrote:
>> and it will give an error message when %d is 07, 08, or 09
>> (because 0x is interpreted as an octal number).
>> 
>> 
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> 30-Day 
> trial. Simplify your report design, integration and deployment - and focus
> on 
> what you do best, core application coding. Discover what's new with
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Re: [Gnuplot-info] set xrange from variable

[Steve C. <sc...@ja...>]

07 is not valid octal?

Thomas Sefzick wrote:
> and it will give an error message when %d is 07, 08, or 09
> (because 0x is interpreted as an octal number).
> 
> 

[Gnuplot-info] Combining a 3D and a 2D splot with no surface

[<mg...@fi...>]

Hi all,

I'm trying to combine the plotting of a heightmap (using contourlines) and
a line.

The .plot file basically is as follows:

set size square
set data style lines
set pm3d at b interpolate 10,10
set contour
set cntrparam bspline
set view map
unset surface
splot "results.dat" using ($2):($3):($1) notitle, "line.dat" using 1:2:(0)

The results.dat file contains X, Y and Z values, the line.dat file (which
represent a line y = 2-x) only contains X and Y values, with the Z value,
as you can see, set at a constant of 0.

I use 'unset surface' because otherwise a grid-like figure through the
datapoints in results.dat will be plotted, which is very much undesirable
in my case. However, this also means that the line represented by line.dat
is not plotted. Is this in any way avoidable? That is, can I draw the line
in line.dat without also having the plot the grid-like figure?

Kind regards,

Michiel

Re: [Gnuplot-info] set xrange from variable

[Thomas S. <t.s...@fz...>]

FlavioB wrote:
> 
> ...
> Can you correct me if I'm wrong? It give 2009-11-01 because it evaluates
> the first piece of code up to "%Y"? And then it takes "-%m" and "-%d" as
> single numerical values?
> 

yes, and takes 2009-11-01 as a request to calculate the result.
and it will give an error message when %d is 07, 08, or 09
(because 0x is interpreted as an octal number).


FlavioB wrote:
> 
>> you need to make clear that you expect a string:
>> FIRST_DAY=system('date -d "-$(($(date +%d)-1)) days" 
>> +%Y-%m-%d')
>> FIRST_DAY="`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`"
> 
> Many many thanks, but as I'm curious and willing to learn some more:
> what's the "system" word standing for?
> 

http://www.gnuplot.info/docs/node336.html
http://www.gnuplot.info/docs/node327.html


FlavioB wrote:
> 
> And how do I use double-quotes and/or single-quotes
> (like in your second example)?
> 

that's not so easy...
the outer double quotes are needed to make clear that the
result of the 'date' command is a string:

print `date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`
1997
print "`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`"
2009-11-01

single quotes would not work here, because then the backquotes
would not be interpreted (by gnuplot):

print '`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`'
`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`

the double quotes inside the backquotes are essential, single
quotes would work here (due to the expansions the shell
does):

print "`date -d '-$(($(date +%d)-1)) days' +%Y-%m-%d`"
date: invalid date `-$(($(date +%d)-1)) days'

obviously, the double quotes inside the backquotes are not
interpreted as string delimiters by gnuplot, otherwise the
string would end in between.


FlavioB wrote:
> 
> Thanks again and kind regards,
> Flavio Boniforti
> 
> PIRAMIDE INFORMATICA SAGL
> Via Ballerini 21
> 6600 Locarno
> Switzerland
> Phone: +41 91 751 68 81
> Fax: +41 91 751 69 14
> URL: http://www.piramide.ch
> E-mail: fl...@pi... 
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> 30-Day 
> trial. Simplify your report design, integration and deployment - and focus
> on 
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Gnuplot-info mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

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Re: [Gnuplot-info] set xrange from variable

[Boniforti F. <fl...@pi...>]

Hallo Thomas,

> you get what you request ;-)

That's for sure, as we're talking about computers ;-)

> `date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d` gives
> 2009-11-01

Can you correct me if I'm wrong? It give 2009-11-01 because it evaluates
the first piece of code up to "%Y"? And then it takes "-%m" and "-%d" as
single numerical values?

[cut]

> you need to make clear that you expect a string:
> FIRST_DAY=system('date -d "-$(($(date +%d)-1)) days" 
> +%Y-%m-%d') FIRST_DAY="`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`"

Many many thanks, but as I'm curious and willing to learn some more:
what's the "system" word standing for?
And how do I use double-quotes and/or single-quotes (like in your second
example)?

Thanks again and kind regards,
Flavio Boniforti

PIRAMIDE INFORMATICA SAGL
Via Ballerini 21
6600 Locarno
Switzerland
Phone: +41 91 751 68 81
Fax: +41 91 751 69 14
URL: http://www.piramide.ch
E-mail: fl...@pi... 

Re: [Gnuplot-info] set xrange from variable

[Thomas S. <t.s...@fz...>]

you get what you request ;-)

`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`
gives
2009-11-01

and

FIRST_DAY=2009-11-01
is
2009 - 11 - 1 = 1997

you need to make clear that you expect a string:
FIRST_DAY=system('date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d')
FIRST_DAY="`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`"


FlavioB wrote:
> 
>> FIRST_DAY=`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d` 
>> LAST_DAY=`date -d "+1 month -$(date +%d) days" +%Y-%m-%d`
> 
> I just discovered that it doesn't assign correctly the value I want, in
> gnuplot:
> 
> gnuplot> FIRST_DAY=`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`
> gnuplot> print FIRST_DAY
> 1997
> 
> While at the usual bash prompt I get:
> 
> storebox:~# date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d
> 2009-11-01
> 
> How come?
> 
> Thanks,
> Flavio Boniforti
> 
> PIRAMIDE INFORMATICA SAGL
> Via Ballerini 21
> 6600 Locarno
> Switzerland
> Phone: +41 91 751 68 81
> Fax: +41 91 751 69 14
> URL: http://www.piramide.ch
> E-mail: fl...@pi... 
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> 30-Day 
> trial. Simplify your report design, integration and deployment - and focus
> on 
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Gnuplot-info mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

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Re: [Gnuplot-info] set xrange from variable

[Boniforti F. <fl...@pi...>]

> FIRST_DAY=`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d` 
> LAST_DAY=`date -d "+1 month -$(date +%d) days" +%Y-%m-%d`

I just discovered that it doesn't assign correctly the value I want, in
gnuplot:

gnuplot> FIRST_DAY=`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`
gnuplot> print FIRST_DAY
1997

While at the usual bash prompt I get:

storebox:~# date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d
2009-11-01

How come?

Thanks,
Flavio Boniforti

PIRAMIDE INFORMATICA SAGL
Via Ballerini 21
6600 Locarno
Switzerland
Phone: +41 91 751 68 81
Fax: +41 91 751 69 14
URL: http://www.piramide.ch
E-mail: fl...@pi... 

[Gnuplot-info] set xrange from variable

[Boniforti F. <fl...@pi...>]

Hello everybody,

I'm still trying to make successfull use of variables in my gnuplot
script, so I'm asking how it would be possible to do a "set xrange"
using a variable.

I have following variables:

FIRST_DAY=`date -d "-$(($(date +%d)-1)) days" +%Y-%m-%d`
LAST_DAY=`date -d "+1 month -$(date +%d) days" +%Y-%m-%d`

What I need to achieve is to set xrange in between the above two values.
Today it should give:

set xrange = [2009-11-01:2009-11-30]

I tried with

set xrange = [FIRST_DAY:LAST_DAY]

but it doesn't work.

Any help will be appreciated!

Thanks,
Flavio Boniforti

PIRAMIDE INFORMATICA SAGL
Via Ballerini 21
6600 Locarno
Switzerland
Phone: +41 91 751 68 81
Fax: +41 91 751 69 14
URL: http://www.piramide.ch
E-mail: fl...@pi... 

Re: [Gnuplot-info] Creating graphs from byte transfers and scheduling them

[Boniforti F. <fl...@pi...>]

Hallo Hans-Bernhard,

> > A) the graph should be generated *new* when the actual 
> month is over 
> > (I'd like to have different PNGs for each month);
> 
> That's mainly between you and your data generation scripts to handle.

OK, I'll go for it after I have my gnuplot script working...

> > B) it should be schedulable, but I don't know how to put or pass 
> > variables to the plot script
> 
> There are several approaches.  The basic choice is between 
> parametrizing
>   a canned gnuplot script from the outside using environment 
> variables (`echo $VARIABLE` style), and modifying the script 
> on the fly (HERE script or piping individual commands from 
> another scripting language to gnuplot).

Well, actually I have played a bit with setting variables inside gnuplot and trying to concatenate them.

I succeeded in concatenating *string* variables:

gnuplot> VAR='polti'.'-'.`date +%Y`
gnuplot> print VAR
polti-2009
gnuplot> VAR=VAR.'-'.`date +%m`
gnuplot> print VAR
polti-2009-11

I think playing with these sort of variable definitions, also will lead me to success... What do you think of this?

Thanks,
Flavio Boniforti

PIRAMIDE INFORMATICA SAGL
Via Ballerini 21
6600 Locarno
Switzerland
Phone: +41 91 751 68 81
Fax: +41 91 751 69 14
URL: http://www.piramide.ch
E-mail: fl...@pi... 

Re: [Gnuplot-info] Problem with correct treatment a missing value in for loop

[Thomas S. <t.s...@fz...>]

using :(column(i))


chudson wrote:
> 
> Hi all.I have a huge problem with setting up a treatment a missing value
> inside a for loop(gnuplot version : 4.3).I need to get a state when a
> missing value is  detected, then its skipped on  ,not interpolated.I read
> the tip for use the $ inside using part with a number(variable) but it
> doesnt work inside for loop.
> The code:
> 
> infile="/home/analiza/webgen/trans_danych/DLM_6m.csv"
> outfile="/home/analiza/webgen/trans_danych/DLM_6m.png"
> column=2
> pictTitle="DLM"
> columnList="DATA WARTOSC CEL_OD CEL_DO "
> objectList=""
> counterList="DATA WARTOSC CEL_OD CEL_DO "
> nColumn=4
> nCounter=4
> nObject=1
> objectId=1
> objectName=""
> set datafile separator ';'
> set decimalsign locale 'slovenian'
> set title "DLM"
> set xtics 1
> set xtics ("2009-04" 0, "2009-05" 1, "2009-06" 2, "2009-07" 3, "2009-08"
> 4, "2009-09" 5, "2009-10" 6, "2009-11" 7, "2009-12" 8)
> set xdata time
> set datafile missing " "
> set timefmt "%Y-%m-%d"
> set format y "%.10g"
> set autoscale x
> set terminal png  size 600,450
> set output outfile
> set grid y
> set key under nobox
> set macros
> set datafile missing "NaN"
> ymax =  sprintf("\"\`\cat %s |cut -d \"\;\"\ -f2|sort -n -u|head -2|tail
> -1|tr ',' '.'\`\"",infile)
> ymin= sprintf("\"\`\cat %s |cut -d \"\;\"\ -f2|sort -n -u|tail -1|tr ','
> '.'\`\"",infile)
> set yrange[0.999*@ymin:@ymax*1.001]
> set xtics rotate by 90
> plot for [i=2:nColumn] infile every ::1 using :i with linespoints title
> word(counterList,i)
> 
> So,my question is how use the variable i to create a state i need.
> Any ideas will be appreciated
> 
> 
> 

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Re: [Gnuplot-info] plotting a not so easy function...

[Thomas S. <t.s...@fz...>]

f(x,y)=y<-abs(0.8*x-0.4)?100.*(y-x**2)**2+(1.-x)**2-200.:400.*(x**2-x*y+0.2*y**4)-1000.*sin(y**2-x**3)
splot f(x,y)

see:
http://www.gnuplot.info/docs/node58.html


Hugo Gagnon-4 wrote:
> 
> Hello,
> I am relatively new to gnuplot and I would like your opinion on how to
> plot f(x1,x2) as follows:
> 
> b = -abs(0.8*x1 - .4)
> if (x2 < b) then
> f = 100*(x2 - x1^2)^2 + (1 - x1)^2 - 200
> else
> f = 400*(x1^2 - x1*x2 + .2*x2^4) - 1000*sin(x2^2 - x1^3)
> endif
> 
> Thank you,
> -- 
>   Hugo Gagnon
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> 30-Day 
> trial. Simplify your report design, integration and deployment - and focus
> on 
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Gnuplot-info mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

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[Gnuplot-info] plotting a not so easy function...

[Hugo G. <gn...@li...>]

Hello,
I am relatively new to gnuplot and I would like your opinion on how to
plot f(x1,x2) as follows:

b = -abs(0.8*x1 - .4)
if (x2 < b) then
f = 100*(x2 - x1^2)^2 + (1 - x1)^2 - 200
else
f = 400*(x1^2 - x1*x2 + .2*x2^4) - 1000*sin(x2^2 - x1^3)
endif

Thank you,
-- 
  Hugo Gagnon

Re: [Gnuplot-info] Creating graphs from byte transfers and scheduling them

[Hans-Bernhard B. <HBB...@t-...>]

Boniforti Flavio wrote:

> A) the graph should be generated *new* when the actual month is over
> (I'd like to have different PNGs for each month);

That's mainly between you and your data generation scripts to handle.

> B) it should be schedulable, but I don't know how to put or pass
> variables to the plot script

There are several approaches.  The basic choice is between parametrizing 
  a canned gnuplot script from the outside using environment variables 
(`echo $VARIABLE` style), and modifying the script on the fly (HERE 
script or piping individual commands from another scripting language to 
gnuplot).

Re: [Gnuplot-info] rowstacked with 60 columns: key pushes graph off page

[Murray C. <mu...@mu...>]

On Fri, 2009-11-20 at 07:54 -0800, Thomas Sefzick wrote:
> increase the size of the postscript output:
> 
> set terminal postscript enhanced color size 80cm,29.7cm

Thanks. Is there any generic way to make it "big enough", or to know how
much space would be needed?

-- 
mu...@mu...
www.murrayc.com
www.openismus.com

Re: [Gnuplot-info] Histogram plots not working as inline data?

[Thomas S. <t.s...@fz...>]

each plot needs it's own data:

http://www.gnuplot.info/docs/node131.html


stevecoh1 wrote:
> 
> I am having trouble getting a histogram plot to work.
> 
> As an experiment I tried the following which is approximately similar to
>  my script"
> 
> Take the histogram4.gnu script from demos.
> Replace the "immigration.dat" file reference with "-" and copy the data
> inline data from immigration.dat into the script, resulting in the
> attached histograms4a.gnu.
> 
> The original script works fine.  The script with the inline data
> produces the following and a graph with only the first set plotted.
> This pattern is observed whether or not the final "e" line is present in
> the script.  What is happening here and how may it be fixed?
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
>                                    ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
>                                                ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
>                                                            ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
>                                                                        ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
>            ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
>                        ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
>                                    ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
>                                                ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
>                                                             ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
>                                                                          ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
>               ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
>                            ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
>                                         ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
>                                                      ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
>                                                                   ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
> 
>        ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
> 
>                     ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
> 
>                                  ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
> 
>                                               ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
> 6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
> using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
> 17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
> 
> 
> 
>                                                            ^
> "histograms.4a.gnu", line 37: warning: Skipping data file with no valid
> points
> 
> # set terminal png transparent nocrop enhanced font arial 8 size 500,350 
> # set output 'histograms.4.png'
> set bar 1.000000
> set boxwidth 0.75 absolute
> set style fill  solid 1.00 border -1
> set style rectangle back fc lt -3 fillstyle  solid 1.00 border -1
> set key outside right top vertical Left reverse enhanced autotitles
> columnhead nobox
> set key invert samplen 4 spacing 1 width 0 height 0 
> set style histogram rowstacked title  offset character 0, 0, 0
> set datafile missing '-'
> set style data histograms
> set xtics border in scale 1,0.5 nomirror rotate by -45  offset character
> 0, 0, 0
> set xtics  norangelimit
> set xtics   ("1891-1900" 0.00000 -1, "1901-1910" 1.00000 -1, "1911-1920"
> 2.00000 -1, "1921-1930" 3.00000 -1, "1931-1940" 4.00000 -1, "1941-1950"
> 5.00000 -1, "1951-1960" 6.00000 -1, "1961-1970" 7.00000 -1)
> set title "US immigration from Europe by decade\nPlot as stacked
> histogram" 
> set rrange [ * : * ] noreverse nowriteback  # (currently [0.00000:10.0000]
> )
> set trange [ * : * ] noreverse nowriteback  # (currently
> [-5.00000:5.00000] )
> set urange [ * : * ] noreverse nowriteback  # (currently
> [-5.00000:5.00000] )
> set vrange [ * : * ] noreverse nowriteback  # (currently
> [-5.00000:5.00000] )
> set ylabel  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
> set y2label  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
> set yrange [ 0.00000 : 7.00000e+06 ] noreverse nowriteback
> set cblabel  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
> set locale "C"
> plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using 6,
> '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, '' using 12,
> '' using 13, '' using 14, '' using 15, '' using 16, '' using 17, '' using
> 18, '' using 19, '' using 20, '' using 21, '' using 22
> # IMMIGRATION BY REGION AND SELECTED COUNTRY OF LAST RESIDENCE
> #
> Region	Austria	Hungary	Belgium	Czechoslovakia	Denmark	France	Germany
> Greece	Ireland	Italy	Netherlands	Norway	Sweden	Poland	Portugal	Romania
> Soviet_Union	Spain	Switzerland	United_Kingdom	Yugoslavia	Other_Europe
> TOTAL	
> 1891-1900	234081	181288	18167	-	50231	30770	505152	15979	388416	651893
> 26758	95015	226266	96720	27508	12750	505290	8731	31179	271538	-	282
> 3378014	
> 1901-1910	668209	808511	41635	-	65285	73379	341498	167519	339065	2045877
> 48262	190505	249534	-	69149	53008	1597306	27935	34922	525950	-	39945
> 7387494	
> 1911-1920	453649	442693	33746	3426	41983	61897	143945	184201	146181
> 1109524	43718	66395	95074	4813	89732	13311	921201	68611	23091	341408	1888
> 31400	4321887	
> 1921-1930	32868	30680	15846	102194	32430	49610	412202	51084	211234	455315
> 26948	68531	97249	227734	29994	67646	61742	28958	29676	339570	49064	42619
> 2463194	
> 1931-1940	3563	7861	4817	14393	2559	12623	144058	9119	10973	68028	7150
> 4740	3960	17026	3329	3871	1370	3258	5512	31572	5835	11949	377566	
> 1941-1950	24860	3469	12189	8347	5393	38809	226578	8973	19789	57661	14860
> 10100	10665	7571	7423	1076	571	2898	10547	139306	1576	8486	621147	
> 1951-1960	67106	36637	18575	918	10984	51121	477765	47608	43362	185491
> 52277	22935	21697	9985	19588	1039	671	7894	17675	202824	8225	16350	1325727	
> 1961-1970	20621	5401	9192	3273	9201	45237	190796	85969	32966	214111	30606
> 15484	17116	53539	76065	3531	2465	44659	18453	213822	20381	11604	1124492	
> e
> 
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> 30-Day 
> trial. Simplify your report design, integration and deployment - and focus
> on 
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Gnuplot-info mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

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[Gnuplot-info] Histogram plots not working as inline data?

[Steve C. <sc...@ja...>]

I am having trouble getting a histogram plot to work.

As an experiment I tried the following which is approximately similar to
 my script"

Take the histogram4.gnu script from demos.
Replace the "immigration.dat" file reference with "-" and copy the data
inline data from immigration.dat into the script, resulting in the
attached histograms4a.gnu.

The original script works fine.  The script with the inline data
produces the following and a graph with only the first set plotted.
This pattern is observed whether or not the final "e" line is present in
the script.  What is happening here and how may it be fixed?

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
                                   ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
                                               ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
                                                           ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22
                                                                       ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22

           ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22

                       ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22

                                   ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22

                                               ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22

                                                            ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22

                                                                         ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22


              ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22


                           ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22


                                        ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22


                                                     ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22


                                                                  ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22



       ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22



                    ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22



                                 ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22



                                              ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

plot '-' using 2:xtic(1), '' using 3, '' using 4, '' using 5, '' using
6, '' using 7, '' using 8, '' using 9, '' using 10, '' using 11, ''
using 12, '' using 13, '' using 14, '' using 15, '' using 16, '' using
17, '' using 18, '' using 19, '' using 20, '' using 21, '' using 22



                                                           ^
"histograms.4a.gnu", line 37: warning: Skipping data file with no valid
points

[Gnuplot-info] Creating graphs from byte transfers and scheduling them

[Boniforti F. <fl...@pi...>]

Hello everybody.

I'm pretty new at gnuplot, but I already achieved my first result...
(see: http://yfrog.com/j8polti200911p )

Now, what I'm doing is to grab every night the total amount of traffic
being sent/received via SSH between my server and a couple of different
remote hosts. I achieved this via iptables, but I don't want to bother
you all... The result of this data collection is like:

2009-11-16      4296994550      155016994
2009-11-17      6458167774      228657538
2009-11-18      8776045950      424622670

The columns represent date, bytes received, bytes sent.

I now would like to schedule a daily update of the graph you can see at
the above URL, but also:

A) the graph should be generated *new* when the actual month is over
(I'd like to have different PNGs for each month);
B) it should be schedulable, but I don't know how to put or pass
variables to the plot script

Here the plot script I'm using:

set term png
set output 'polti-2009-11.png'
set timestamp 'Ultimo aggiornamento: %d.%m.%Y' top
set xdata time
set timefmt '%Y-%m-%d'
set xrange ['2009-11-01':'2009-11-30']
set xlabel 'Data'
set format x '%d.%m'
set ylabel 'Bytes'
set format y '%.0s %cb'
set title 'Traffico'
set key off
set boxwidth 0.8 relative
set style fill solid 1.0
plot '2009-11-213.200.254.141.dat' using 1:2 with boxes fs solid,\
'2009-11-213.200.254.141.dat' using 1:3 with boxes fs solid

Any help will be appreciated, thanks in advance!

Flavio Boniforti

PIRAMIDE INFORMATICA SAGL
Via Ballerini 21
6600 Locarno
Switzerland
Phone: +41 91 751 68 81
Fax: +41 91 751 69 14
URL: http://www.piramide.ch
E-mail: fl...@pi... 

[Gnuplot-info] rowstacked with 60 columns: key pushes graph off page

[Murray C. <mu...@mu...>]

I'm using gnuplot with "histogram rowstacked" to plot many columns from
a data file. The column titles are quite long too. But the key (legend)
is then too big for the page, and even pushes the graph off the page
when I place the key outside the graph.

Is there any generic way to just get everything to scale down enough to
fit on the page? I'm outputing to .ps, so I don't mind if people have to
zoom in to actually read things.


Here's my whole set of commands.

set terminal postscript enhanced color
set output 'massif_pretty.ps'
set datafile separator '\t'
set key autotitle columnheader
set style data histogram
set style histogram rowstacked
set style fill solid border -1
set xlabel 'Instructions (millions)'
set ylabel 'Kilobytes (KiB)'
set key outside bottom reverse
set xtics nomirror rotate by 90
set format x "%.0f"
set ytics nomirror
set format y "%.0fk"
plot 'gnuplot.data' using using=2:xtic(1), '' using 2, '' using 3, ''
using 4, '' using 5, '' using 6, '' using 7, '' using 8, '' using 9, ''
using 10, '' using 11, '' using 12, '' using 13, '' using 14, '' using
15, '' using 16, '' using 17, '' using 18, '' using 19, '' using 20, ''
using 21, '' using 22, '' using 23, '' using 24, '' using 25, '' using
26, '' using 27, '' using 28, '' using 29, '' using 30, '' using 31, ''
using 32, '' using 33, '' using 34, '' using 35, '' using 36, '' using
37, '' using 38, '' using 39, '' using 40, '' using 41, '' using 42, ''
using 43, '' using 44, '' using 45, '' using 46, '' using 47, '' using
48, '' using 49, '' using 50, '' using 51, '' using 52, '' using 53, ''
using 54, '' using 55, '' using 56, '' using 57, '' using 58, '' using
59


-- 
mu...@mu...
www.murrayc.com
www.openismus.com

Re: [Gnuplot-info] strange behavior on calling gnuplot from cgi script written in python

[Steve C. <sc...@ja...>]

Thanks for that hint.  I like learning something new every day.  :-)
Steve
Thomas Sefzick wrote:
> i'm not sure if 'flush' is really needed for perl.
> 
> python has the '-u' option to have stdin, stdout,
> and stderr unbuffered.
> perl doesn't have a similar option.
> so i think it's a python-specific problem.
> 
> BTW, by using
> #!/usr/bin/python -u
> as the 1st line of your script, you need no 'flush()'
> 
> 
> stevecoh1 wrote:
>> Thank you!  That's the answer.  Might want to tell Mr. Janert about this
>> so they can print an errata.  Or is the flush not necessary in Perl?
>>
>>
>> Thomas Sefzick wrote:
>>
>>> you need a 'flush' after 'print'ing the two lines:
>>>
>>> #!/usr/bin/python
>>>
>>> import os
>>> import sys
>>> import math
>>>
>> ------------------------------------------------------------------------------
>> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
>> 30-Day 
>> trial. Simplify your report design, integration and deployment - and focus
>> on 
>> what you do best, core application coding. Discover what's new with
>> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
>> _______________________________________________
>> Gnuplot-info mailing list
>> Gnu...@li...
>> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>>
>>
> 

Re: [Gnuplot-info] strange behavior on calling gnuplot from cgi script written in python

[Steven M. <smi...@gm...>]

Auto flush might be turned on in perl

$|=1

I suspect that this is like python unbuffered....

Steve
On Nov 16, 2009, at 8:47 AM, Steve Cohen wrote:

> Thank you!  That's the answer.  Might want to tell Mr. Janert about  
> this
> so they can print an errata.  Or is the flush not necessary in Perl?
>
>
> Thomas Sefzick wrote:
>
>>
>> you need a 'flush' after 'print'ing the two lines:
>>
>> #!/usr/bin/python
>>
>> import os
>> import sys
>> import math
>>
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008  
> 30-Day
> trial. Simplify your report design, integration and deployment - and  
> focus on
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Gnuplot-info mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info

Re: [Gnuplot-info] strange behavior on calling gnuplot from cgi script written in python

[Thomas S. <t.s...@fz...>]

i'm not sure if 'flush' is really needed for perl.

python has the '-u' option to have stdin, stdout,
and stderr unbuffered.
perl doesn't have a similar option.
so i think it's a python-specific problem.

BTW, by using
#!/usr/bin/python -u
as the 1st line of your script, you need no 'flush()'


stevecoh1 wrote:
> 
> Thank you!  That's the answer.  Might want to tell Mr. Janert about this
> so they can print an errata.  Or is the flush not necessary in Perl?
> 
> 
> Thomas Sefzick wrote:
> 
>> 
>> you need a 'flush' after 'print'ing the two lines:
>> 
>> #!/usr/bin/python
>> 
>> import os
>> import sys
>> import math
>> 
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> 30-Day 
> trial. Simplify your report design, integration and deployment - and focus
> on 
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Gnuplot-info mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

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Re: [Gnuplot-info] Multiple series from a script

[Steve C. <sc...@ja...>]

Duh, answering my own question, this one was in the book (p.230).

This version works.  I had been under the mistaken impression that the
"pipe" version of "data files" had to follow the disk version exactly,
but it's actually MORE flexible.  You don't have to have all this double
line hackery.  "e" should be thought of as standing for "end of data" as
opposed to "end of file" which is how I was thinking of it.

#!/usr/bin/python

import os
import sys

print "Content-Type: image/png"     # This is an image
print                               # blank line, end of headers
sys.stdout.flush()

gp = os.popen("/usr/bin/gnuplot", 'w')
gp.write('reset\n')
gp.write('set xdata time\n')
gp.write('set timefmt "%Y-%m-%d"\n')
gp.write('set format x "%b"\n')
gp.write('set xrange ["2008-11-15":"2009-11-14"]\n')
gp.write('set yrange [0:24]\n')
gp.write('set ylabel "Hours in use per day"\n')
gp.write('set term png size 960,400 x000000 xdfdfdf xffffff xffff00
x0000ff\n')
gp.write('set output "~/test.png"\n')
gp.write('plot  "-"  u 1:2 ti "Weekday" w impulses, "-" u 1:2 ti
"Weekend" w impulses\n')
gp.write('2009-07-13	0.5799	6\n')
gp.write('2009-07-14	0.2618	3\n')
gp.write('2009-07-15	0.4646	4\n')
gp.write('2009-07-28	0.2069	2\n')
gp.write('2009-08-18	1.1181	11\n')
gp.write('e\n')
gp.write('2009-07-11	0.7243	7\n')
gp.write('2009-08-30	0.1646	4\n')
gp.write('e\n')
gp.close()




Steve Cohen wrote:
> How is it possible to show multiple data series from a script?
> 
> The following doesn't work.  Only the first series gets plotted
> 
> 
> #!/usr/bin/python
> 
> import os
> import sys
> 
> print "Content-Type: image/png"     # This is an image
> print                               # blank line, end of headers
> sys.stdout.flush()
> 
> gp = os.popen("/usr/bin/gnuplot", 'w')
> gp.write('reset\n')
> gp.write('set xdata time\n')
> gp.write('set timefmt "%Y-%m-%d"\n')
> gp.write('set format x "%b"\n')
> gp.write('set xrange ["2008-11-15":"2009-11-14"]\n')
> gp.write('set yrange [0:24]\n')
> gp.write('set ylabel "Hours in use per day"\n')
> gp.write('set term png size 960,400 x000000 xdfdfdf xffffff xffff00
> x0000ff\n')
> gp.write('set output "~/test.png"\n')
> gp.write('plot  "-"  index 0 u 1:2 ti "Weekday" w impulses,  ""  index 1
> u 1:2 ti "Weekend" w impulses\n')
> gp.write('2009-07-13	0.5799	6\n')
> gp.write('2009-07-14	0.2618	3\n')
> gp.write('2009-07-15	0.4646	4\n')
> gp.write('2009-07-28	0.2069	2\n')
> gp.write('2009-08-18	1.1181	11\n')
> gp.write('\n')
> gp.write('\n')
> gp.write('2009-07-11	0.7243	7\n')
> gp.write('2009-08-30	0.1646	4\n')
> gp.write('e\n')
> gp.close()
> 
> The following error message is seen.
> 
> gnuplot> plot  "-"  index 0 u 1:2 ti "Weekday" w impulses,  ""  index 1
> u 1:2 ti "Weekend" w impulses
> 
>                    ^
>          line 10: warning: Skipping data file with no valid points
> 
> 
> If instead I modify the script to read the same data from a data file
> both sets are plotted:
> 
> #!/usr/bin/python
> 
> import os
> import sys
> 
> print "Content-Type: image/png"     # This is an image
> print                               # blank line, end of headers
> sys.stdout.flush()
> 
> gp = os.popen("/usr/bin/gnuplot", 'w')
> gp.write('reset\n')
> gp.write('set xdata time\n')
> gp.write('set timefmt "%Y-%m-%d"\n')
> gp.write('set format x "%b"\n')
> gp.write('set xrange ["2008-11-15":"2009-11-14"]\n')
> gp.write('set yrange [0:24]\n')
> gp.write('set ylabel "Hours in use per day"\n')
> gp.write('set term png size 960,400 x000000 xdfdfdf xffffff xffff00
> x0000ff\n')
> gp.write('set output "~/test.png"\n')
> gp.write('plot  "~/script.data"  index 0 u 1:2 ti "Weekday" w impulses,
>  ""  index 1 u 1:2 ti "Weekend" w impulses\n')
> gp.close()
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
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> 
> 

[Gnuplot-info] Multiple series from a script

[Steve C. <sc...@ja...>]

How is it possible to show multiple data series from a script?

The following doesn't work.  Only the first series gets plotted


#!/usr/bin/python

import os
import sys

print "Content-Type: image/png"     # This is an image
print                               # blank line, end of headers
sys.stdout.flush()

gp = os.popen("/usr/bin/gnuplot", 'w')
gp.write('reset\n')
gp.write('set xdata time\n')
gp.write('set timefmt "%Y-%m-%d"\n')
gp.write('set format x "%b"\n')
gp.write('set xrange ["2008-11-15":"2009-11-14"]\n')
gp.write('set yrange [0:24]\n')
gp.write('set ylabel "Hours in use per day"\n')
gp.write('set term png size 960,400 x000000 xdfdfdf xffffff xffff00
x0000ff\n')
gp.write('set output "~/test.png"\n')
gp.write('plot  "-"  index 0 u 1:2 ti "Weekday" w impulses,  ""  index 1
u 1:2 ti "Weekend" w impulses\n')
gp.write('2009-07-13	0.5799	6\n')
gp.write('2009-07-14	0.2618	3\n')
gp.write('2009-07-15	0.4646	4\n')
gp.write('2009-07-28	0.2069	2\n')
gp.write('2009-08-18	1.1181	11\n')
gp.write('\n')
gp.write('\n')
gp.write('2009-07-11	0.7243	7\n')
gp.write('2009-08-30	0.1646	4\n')
gp.write('e\n')
gp.close()

The following error message is seen.

gnuplot> plot  "-"  index 0 u 1:2 ti "Weekday" w impulses,  ""  index 1
u 1:2 ti "Weekend" w impulses

                   ^
         line 10: warning: Skipping data file with no valid points


If instead I modify the script to read the same data from a data file
both sets are plotted:

#!/usr/bin/python

import os
import sys

print "Content-Type: image/png"     # This is an image
print                               # blank line, end of headers
sys.stdout.flush()

gp = os.popen("/usr/bin/gnuplot", 'w')
gp.write('reset\n')
gp.write('set xdata time\n')
gp.write('set timefmt "%Y-%m-%d"\n')
gp.write('set format x "%b"\n')
gp.write('set xrange ["2008-11-15":"2009-11-14"]\n')
gp.write('set yrange [0:24]\n')
gp.write('set ylabel "Hours in use per day"\n')
gp.write('set term png size 960,400 x000000 xdfdfdf xffffff xffff00
x0000ff\n')
gp.write('set output "~/test.png"\n')
gp.write('plot  "~/script.data"  index 0 u 1:2 ti "Weekday" w impulses,
 ""  index 1 u 1:2 ti "Weekend" w impulses\n')
gp.close()

Re: [Gnuplot-info] strange behavior on calling gnuplot from cgi script written in python

[Steve C. <sc...@ja...>]

Thank you!  That's the answer.  Might want to tell Mr. Janert about this
so they can print an errata.  Or is the flush not necessary in Perl?


Thomas Sefzick wrote:

> 
> you need a 'flush' after 'print'ing the two lines:
> 
> #!/usr/bin/python
> 
> import os
> import sys
> import math
> 

Re: [Gnuplot-info] strange behavior on calling gnuplot from cgi script written in python

[Thomas S. <t.s...@fz...>]

you're right, there are no 'separate ways' (i first thought the
'Content-Type' lines would go somewhere else than the gnuplot
output, but that's not the case).
both, the print commands and gnuplots output go through stdout - but,
i just ran your little script and realized that the 'Content-Type' lines are
at the end.
you can reproduce this by running your script in a terminal and
piping the output into a file.

you need a 'flush' after 'print'ing the two lines:

#!/usr/bin/python

import os
import sys
import math

print "Content-Type: image/png"     # This is an image
print                               # blank line, end of headers
sys.stdout.flush();

gp = os.popen("/usr/bin/gnuplot", 'w')
gp.write("set term png;set o;")
gp.write("plot '-' u 1:2 w linesp\n")

xs = [a/10.0 for a in range(0,101,1)]
for x in xs:
    y = x * math.sin(x)
    gp.write( "%f %f\n" % (x, y))
gp.write("e\n")
gp.close()


stevecoh1 wrote:
> 
> OK, I feel like an idiot but I guess I'm really not understanding you
> even after reading the document you referred me to.  The specific words
> I'm not understanding are "going separate ways".
> 
> To that end I've gone back to basics and rewritten the example on p. 241
> in python.  I believe my translation is more or less exact:
> 
> ================================
> #!/usr/bin/python
> 
> import os
> import math
> 
> print "Content-Type: image/png"     # This is an image
> print                               # blank line, end of headers
> 
> gp = os.popen("/usr/bin/gnuplot", 'w')
> gp.write("set term png;set o;")
> gp.write("plot '-' u 1:2 w linesp\n")
> 
> xs = [a/10.0 for a in range(0,101,1)]
> for x in xs:
>     y = x * math.sin(x)
>     gp.write( "%f %f\n" % (x, y))
> gp.write("e\n")
> gp.close()
> 
> 
> 
> =================================
> 
> This fails with the following message
> [error] [client ::1] malformed header from script. Bad header=\x89PNG:
> 
> whether or not the gp.close() line is commented out.
> 
> What am I missing?
> 
> 
> 
> 
> 
> Thomas Sefzick wrote:
>> seems that your header:
>> 
>> print "Content-Type: image/png"     # This is an image
>> print                               # blank line, end of headers
>> 
>> and gnuplots output (png graphics) are going different
>> ways, because the png graphics is sent without header
>> (a png file starts with "\x89PNG").
>> 
>> have a look at the section "Object Headers" in
>> http://marc.merlins.org/htmlearn/misc/cgi-faq.txt
>> 
>> 
>> stevecoh1 wrote:
>>> Here's the error:
>>>
>>>  [error] [client ::1] malformed header from script. Bad header=\x89PNG:
>>> usage_graph.cgi
>>>
> 
> ...
> 
> 
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> 30-Day 
> trial. Simplify your report design, integration and deployment - and focus
> on 
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Gnuplot-info mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

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