gnuplot-info — For questions and discussion about gnuplot

Re: [Gnuplot-info] Can I set dash style ?

[BBands <bb...@gm...>]

gnuplot gives you extensive control over the types of lines, but this
is somewhat dependent on the terminal you are using. See 'help lines'
and 'help linestyle'. Also check the help for your terminal, for
example 'help term wxt', to see what line types it is capable of.

Best,

    John

On Wed, Jul 25, 2012 at 10:56 PM, gbliu <goo...@gm...> wrote:
> Hello erveryone,
>
> I want to set the style of dashed line, that is, how dashed the line is.
> e.g. - - - - or - - - - or -- -- -- ....
> How can I do it?

[Gnuplot-info] Can I set dash style ?

[gbliu <goo...@gm...>]

Hello erveryone,

I want to set the style of dashed line, that is, how dashed the line is.
e.g. - - - - or - - - - or -- -- -- ....
How can I do it?

gbliu

Re: [Gnuplot-info] Multiplot

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

set multiplot
   set size 0.5,0.5
   set origin 0.0,0.5
   plot ...
   set origin 0.5,0.5
   plot ...
   set size 1.0,0.5
   set origin 0.0,0.0
   plot ...
unset multiplot

to have the borders of the plots aligned you may have
to set the margins explicitely.


rpm wrote:
> 
> Hi,
> 
> I've been googling but failed to find an answer :)
> 
> I would like to place 2 smaller plots at the top and 1 long plot that
> would span both columns at the bottom (and create a single figure with
> these). In Matlab, when creating an array of plots (2x2) you have the
> possibility to merge columns. So, the layout I want to get is:
> 
> |plot 1|plot 2|
> |    plot 3     |
> 
> Is this possible? How?
> 
> Thanks!
> 

-- 
View this message in context: http://old.nabble.com/Multiplot-tp34198007p34204734.html
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Re: [Gnuplot-info] Animated plot

[Amol H. <am...@gm...>]

Best way to write a simple c++ code which prints the gnuplot syntax and
just pipe the executable with gnuplot like,

$ ./a.out | gnuplot

It will show you the animation of the data. The delay can be controlled via
c++ function system("sleep 1s")
On Jul 21, 2012 12:15 AM, "(((1/f)))" <fa...@gm...> wrote:

> Hi Nunzio,
>
> ......I use a simpler method.
>
> This is meant for a slightly different purpose, but you can modify it.
> The name of the file can be "xyz.gnu" or "xyz.gp" when you load it.
> Let me know if the script below helps. I just copied it from a folder
> from 2-3 months ago.
>
> cheers,
> -------------------------------------------------------
> (((1/f))) *http://fadereu.posterous.com/*
> -------------------------------------------------------
> *
> *
> *
> reset
> set terminal gif animate delay 10
> set obj 1 rectangle behind from screen 0,0 to screen 1,1
> set obj 1 fillstyle solid 1 fillcolor rgb "sandybrown"
> set key top right box tc rgbcolor 'white' font 'Helvetica,8'
> set label "ZetaTrek 2012" at 80,-110 tc rgbcolor "black" font 'Helvetica,8'
> set output 'apr02.gif'
> do for [t=0:30] {
>        plot [-100:100] [-100:100] t*3 - x**2 ls 7,  \
>                                   t + 2*x ls 7, \
>                                   t**2 + x ls 7, \
>                                   11*t - 23*x ls 7,\
>                                   5*x - t ls 7, \
>                                   7*x - t**3 ls 7, \
>                                   13*t - 4*x ls 3
>        }
> *
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>

Re: [Gnuplot-info] Animated plot

[(((1/f))) <fa...@gm...>]

Hi Nunzio,

......I use a simpler method.

This is meant for a slightly different purpose, but you can modify it.
The name of the file can be "xyz.gnu" or "xyz.gp" when you load it.
Let me know if the script below helps. I just copied it from a folder
from 2-3 months ago.

cheers,
-------------------------------------------------------
(((1/f))) *http://fadereu.posterous.com/*
-------------------------------------------------------
*
*
*
reset
set terminal gif animate delay 10
set obj 1 rectangle behind from screen 0,0 to screen 1,1
set obj 1 fillstyle solid 1 fillcolor rgb "sandybrown"
set key top right box tc rgbcolor 'white' font 'Helvetica,8'
set label "ZetaTrek 2012" at 80,-110 tc rgbcolor "black" font 'Helvetica,8'
set output 'apr02.gif'
do for [t=0:30] {
       plot [-100:100] [-100:100] t*3 - x**2 ls 7,  \
                                  t + 2*x ls 7, \
                                  t**2 + x ls 7, \
                                  11*t - 23*x ls 7,\
                                  5*x - t ls 7, \
                                  7*x - t**3 ls 7, \
                                  13*t - 4*x ls 3
       }
*

Re: [Gnuplot-info] Animated plot

[Nunzio L. <nun...@gm...>]

Hi think I've found the solution, something like

created a file "command.gp":

set parametric
plot "$0" using 1:(a=column(1),b=column(2),NaN) every ::count::count
notitle, cos(t)+a,sin(t)+b,"$0" u 1:2 every ::::count w lines
count = count+1
if (count<1000) reread


and then in gnuplot command-line:

count=0
call 'command.gp' 'datafile.dat'

Now, the "if. ..." line presumes the number of datapoints is fixed (i.e.
1000 in this case). Is there a way to change this into "reread until
End-of-File is reached"??

Regards,

NL.


2012/7/20 Nunzio Losacco <nun...@gm...>

> Hi everyone,
>
> I'm thinking of creating an animated plot.
>
> I have a datafile containing with six columns:
> the first column is the timestep value, monotonically increasing from 0.0
> to 10.0.
> For each timestep value in column 1  columns 2, 3 and 4 contain the
> coordinates of the centre and the radius of a circle whereas columns 5 and
> 6 contain the coordinates of a given point on the former circle.
> My animation should show the evolution of the circle and a line indicating
> the path of the point indicated by the coords in coumns 5 and 6.
>
> Is it possible to do something like that with gnuplot 4.7 ?
>
>
> Regards,
>
> NL
>
>

[Gnuplot-info] Animated plot

[Nunzio L. <nun...@gm...>]

Hi everyone,

I'm thinking of creating an animated plot.

I have a datafile containing with six columns:
the first column is the timestep value, monotonically increasing from 0.0
to 10.0.
For each timestep value in column 1  columns 2, 3 and 4 contain the
coordinates of the centre and the radius of a circle whereas columns 5 and
6 contain the coordinates of a given point on the former circle.
My animation should show the evolution of the circle and a line indicating
the path of the point indicated by the coords in coumns 5 and 6.

Is it possible to do something like that with gnuplot 4.7 ?


Regards,

NL

[Gnuplot-info] A novice's question about gnuplot line styles

[BBands <bb...@gm...>]

Type 'test' at the gnuplot prompt to see the lines styles for your terminal.

    John

On Thu, Jul 19, 2012 at 1:58 PM, Andrew DeYoung <ade...@an...> wrote:
> Hi,
>
> This is probably an obvious question, but I am wondering if you can please
> help me since I am very new to gnuplot.  I have been doing a lot of Google
> searches, and I have had no success in finding a list of the line styles
> available in `gnuplot`.  Do you know if such a compendium/compiled list
> exists?

[Gnuplot-info] A novice's question about gnuplot line styles

[Andrew D. <ade...@an...>]

Hi, 

This is probably an obvious question, but I am wondering if you can please
help me since I am very new to gnuplot.  I have been doing a lot of Google
searches, and I have had no success in finding a list of the line styles
available in `gnuplot`.  Do you know if such a compendium/compiled list
exists?

Thank you so much for your time!

Andrew

Re: [Gnuplot-info] Extracting (approximate) data from a PostScript file containing gnuplot-generated plot

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

Andrew DeYoung <adeyoung <at> andrew.cmu.edu> writes:

> 
> Hi,
> 
> Suppose that I have a PostScript file containing a plot which was generated
> using gnuplot.  However, I do not have the source data, nor do I have the
> gnuplot commands that were used to generate the plot.
> 
> Do you know of any way to somehow extract data from a graphic representation
> (i.e., a PostScript file)?  Such code would have to literally "read off of
> the graph" (in particular, I have a smoothed line/scatter XY plot) from the
> pixel representation, and I know that the results would be approximate at
> best (but this would still be very highly desirable).  
> 
> Do you have any experience with this?  Thank you for your time!
> 
> Andrew DeYoung
> Carnegie Mellon University
> 
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and 
> threat landscape has changed and how IT managers can respond. Discussions 
> will include endpoint security, mobile security and the latest in malware 
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> gnuplot-info mailing list
> gnuplot-info <at> lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

because postscript is a programming language, the
postscript file contains all commands to generate
the plot.
you need to determine the box surrounding the plot
(normally the axes) in postscript units (near the end
of the postscript file), and then with the knowledge
of the original axis ranges (which you see when
printing/viewing the postscript file) you may transform
the plotted points or lines back into the original
coordinate system.

with some basic knowledge of the postscript language
it's relatively easy to extract the data.

you may make a copy of the postscript file, open it
with a normal text editor, and try to identify the
components.
sometimes it helps to change the color by inserting
a line like
   1.0 0.0 0.0 setrgbcolor
into the file and see which lines turn to red when
viewing the file with ghostscript.

an example:

somewhere in the prologe section some commands are
redefined (to save filespace):

...
/M {moveto} bind def
/L {lineto} bind def
/R {rmoveto} bind def
/V {rlineto} bind def
/N {newpath moveto} bind def
/Z {closepath} bind def
/C {setrgbcolor} bind def
/f {rlineto fill} bind def
/g {setgray} bind def
...

later in the file these commands are used
(the following is near the end of the file):

...
% End plot #1
stroke
LTb
546 4871 N
546 280 L
6401 0 V
0 4591 V
-6401 0 V
Z stroke
1.000 UP
1.000 UL
LTb
stroke
grestore
end
showpage
...

the above draws the box around the plot

moveto 546 4871
lineto 546 280
relativelineto 6401 0
relativelineto 0 4591
relativelineto -6401 0

that means the xaxis ranges from 546 to 6947
and the yaxis from 280 to 4871.
i plotted a sin function using default ranges
(i.e. xrange [-10:10], yrange [-1:1]), so for
the xaxis
546 corresponds to -10.
6947 corresponds to 10.
and for the yaxis
280 corresponds to -1.
4871 corresponds to 1.

the datapoints or function line segments are
plotted the same way like the above box:

...
546 3824 M
65 -412 V
64 -445 V
65 -462 V
65 -459 V
64 -438 V
...

which is (in original coordinates):

moveto -10.,0.5438
rlineto 0.0203, -0.1795
rlineto 0.0200, -0.1939
a.s.o.

[Gnuplot-info] Extracting (approximate) data from a PostScript file containing gnuplot-generated plot

[Andrew D. <ade...@an...>]

Hi,

Suppose that I have a PostScript file containing a plot which was generated
using gnuplot.  However, I do not have the source data, nor do I have the
gnuplot commands that were used to generate the plot.

Do you know of any way to somehow extract data from a graphic representation
(i.e., a PostScript file)?  Such code would have to literally "read off of
the graph" (in particular, I have a smoothed line/scatter XY plot) from the
pixel representation, and I know that the results would be approximate at
best (but this would still be very highly desirable).  

Do you have any experience with this?  Thank you for your time!

Andrew DeYoung
Carnegie Mellon University

[Gnuplot-info] Failure of displaying features

[watashi <wa...@po...>]

The default display of line width (or thickness) and font size is small and
therefore I modify quite a bit according to Google search. While pointsize
and linewidth work, the following codes don't work at all.

set key font ",24"
set ylabel "ratio" font ",36"
set ytics font ",36"

set key font ",24" returns an error of "font" not found. The other codes do
not return errors, but the font size doesn't change at all.

I'm using tcsh 
Linux centos117 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:14 EDT 2010 x86_64
x86_64 x86_64 GNU/Linux

gnuplot 4.0 and 4.4.4 both don't work.
-- 
View this message in context: http://old.nabble.com/Failure-of-displaying-features-tp34150592p34150592.html
Sent from the Gnuplot - User mailing list archive at Nabble.com.

Re: [Gnuplot-info] int() strange behaviour

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

On 07.07.2012 01:45, Simon Garfunkel wrote:

> Anyway in my particular situation these "missed approximations"
> have a disastrous effect, since I'm creating classes for an hystogram:
>
> gnuplot> print int(19.1/0.1)
> 191
> gnuplot> print int(19.2/0.1)
> 191
[...]
> Undoubtedly unconvincing classes.

That's because you put your class boundaries exactly on those points 
where you want to check.  In effect you're comparing floating-point 
numbers for exact equality, which is never a good idea.  Hence that 
"hardly ever 1.0" line I quoted earlier.

Yes, you could use an offset.  But ultimately nothing can really help. 
Wherever you place your class boundaries, sometimes the inevitable 
floating-point round-off _will_ move data right across that boundary.

Re: [Gnuplot-info] int() strange behaviour

[Simon G. <tar...@gm...>]

Ok, thank you for being kind with my ignorance.
Anyway in my particular situation these "missed approximations"
have a disastrous effect, since I'm creating classes for an hystogram:

gnuplot> print int(19.1/0.1)
191
gnuplot> print int(19.2/0.1)
191
gnuplot> print int(19.3/0.1)
193
gnuplot> print int(19.4/0.1)
193
gnuplot> print int(19.5/0.1)
195
gnuplot> print int(19.6/0.1)
196
gnuplot> print int(19.7/0.1)
196
gnuplot> print int(19.8/0.1)
198

Undoubtedly unconvincing classes.
I'm bypassing it using

bind(x, l) = int(x/l) * l
plot 'data' using ( bind($1 * 10**6, width * 10**6) * 10**(-6) ): [...]

I think that for my particular data (19.1, 19.5, 19,6, 19.2, ... ) can be
used also

plot 'data' using ( bind($1 +0.05, width) ): [...]

or even the suggested "+ eps".
Well, this was my really problem!
Thank you again for explanations

Re: [Gnuplot-info] int() strange behaviour

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

On 06.07.2012 12:10, Simon Garfunkel wrote:
> Hi all,
> I'm using Gnuplot 4.6 patchlevel 0 on Linux x86_64
> and I get a strange result when using int() function:
> ( I see that also in previous versions)
>
> gnuplot> print 19.2/0.2
> 96.0

Your problem is not actually with int(), it's with floating point 
numbers in general, and the fact that your 'print' command doesn't 
display all there is to know.  Try this instead:

gnuplot> print sprintf("%.16f", 19.2/0.2)
95.9999999999999858

or this:

gnuplot> print 19.2/0.2 - 96
-1.4210854715202e-014

As you see, your result is not quite as exactly equal to 96.0 as the 
simple `print' command makes it out to be.

> I don't know if it is required by some other feature.

It is.  The feature in question is most easily remembered like this:

	In computers 10.0 times 0.1 is hardly ever 1.0

[Gnuplot-info] int() strange behaviour

[Simon G. <tar...@gm...>]

Hi all,
I'm using Gnuplot 4.6 patchlevel 0 on Linux x86_64
and I get a strange result when using int() function:
( I see that also in previous versions)

gnuplot> print 19.2/0.2
96.0
gnuplot> print int(19.2/0.2)
95
gnuplot> print int(96.0)
96

I don't know if it is required by some other feature.
I think it looks a little bit strange and mathematically wrong, isn't it?
I'm missing something?
Thank you

[Gnuplot-info] Suppress antialiasing with command

[Frank S. <der...@gm...>]

Hello, everybody!

The usage of antialiasing is turned on by default, so the lines
===
set term windows
splot x+y
===
yield in a plot that is rendered very slowly.

Is there an option for deactivating antialiasing? It’s not enough just
to turn it off in the plot window with some mouse clicks, I really need
a command and I’d like _not_ to use the wgnuplot.ini.

I (still ;-)) use gnuplot 4.6.0, Windows XP, 32 bit.

Frank

[Gnuplot-info] Several solid surfaces with correct depthorder and data lines

[Frank S. <der...@gm...>]

Hello, gnuploters!

I could need help with a special problem, look at this plot:

set style data lines
set pm3d
#set pm3d depthorder

splot '-' , '-'
0.5 0.7 3.0
0.5 1.3 4.0

0.7 0.7 3.2
0.7 1.3 4.2

0.9 0.7 3.5
0.9 1.3 3.9

e

0.5 0.7 3.5
0.5 1.3 4.5

0.7 0.7 3.7
0.7 1.3 4.7

0.9 0.7 4.0
0.9 1.3 4.4

e

Great. Now I just want these two surfaces to been drawn in the correct
order, so that the one in front always covers the other one. If you
uncomment the above line "set pm3d depthorder", the lines between the
single segments are unfortunately not drawn as before.

Has anyone of you an idea how to combine the advantages of both
representations? I have been studying the manual long enough, but
without success (pay attention to the subsection “Pm3d”).

Additionally: I’d like to change the thickness of the lines. (not so
important)

I use gnuplot 4.6.0 (Windows XP, 32 bit) and am glad for any help!

Frank

[Gnuplot-info] plotting binary files

[Amol H. <am...@gm...>]

Dear all,

How one can plot the binary data stored as double instead of float.

Regards
Amol

[Gnuplot-info] Key background

[David R. <dro...@ya...>]

Hi all

There is a curve which passes over the key (it is at the top right corner) and I don't want to increase the yrange of the plot aimed at solving this problem. For this reason, what could I do? I mean, what I want is the key to cover the part of the corresponding curve (and this is not a problem).

Thanks in advance, 
 
David

Re: [Gnuplot-info] cbaxis in given format and margin

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

On 27.06.2012 10:18, cédric ody wrote:
> Hello and thank you for your answers/advices,
>
>> Well, 30 is rather enormously big for a little annotation.  At that
>> size, your whole plot is only about 30 x 30 characters big. Your cbtics
>> gobble up 20% of the width of the whole plot.
>
> Could you tell me how you made this calculation?

By opening the *.eps produced by your example in ghostview and looking 
at the size of the graph box and that of the characters.

> Can't we fix the size of the canvas and then the size of the plot
> inside? Maybe not, with the eps format?

That's exactly what 'set lmargin' etc. do --- except for splots, unless 
your version of gnuplot is up to date.

[Gnuplot-info] do for (bug or feature) help!

[Pedro J. C. <car...@qt...>]

Dear Users and Developers

I am trying to use the "do for" to plot a large set of data, but I
have two problems that may be a feature rather than a bug.

1. I cannot call a shell inside a loop:

N=100
do for [i = 0:N-1]{

! do_something_external

plot "output4plot.res" index i u 1:9 t "" w p pt 6 ps 1.5 lc rgb "red"
}

Is this a feature or a bug?


2. Now the help... closely related with the previous point. How can I
pass the variable i to an external script. The point is to use awk to
pick up the ith-line of an auxiliary file. I did the most strange way
and can only gets the last line (the script is working ok outside
gnuplot):


N=100
do for [i = 0:N-1]{

set table "out.res"
print i
unset table

set label 1 "`line=$(cat out.res); head -n $line labels4plot.res |
tail -n 1 | gawk '{print $1,$2,$4}'`" at graph 0.9,graph 0.9 right

plot "output4plot.res" index i u 1:9 t "" w p pt 6 ps 1.5 lc rgb "red"
}


Thanks for the help

Pedro

Re: [Gnuplot-info] cbaxis in given format and margin

[cédric o. <ced...@gm...>]

Hello and thank you for your answers/advices,

> Well, 30 is rather enormously big for a little annotation.  At that
> size, your whole plot is only about 30 x 30 characters big. Your cbtics
> gobble up 20% of the width of the whole plot.

Could you tell me how you made this calculation?


> Somewhat obviously no.  You can't cut off 20% of the canvas width and
> keep the aspect of the remaining area the same.

Can't we fix the size of the canvas and then the size of the plot
inside? Maybe not, with the eps format?

Cédric

Re: [Gnuplot-info] square root display error in gnuplot 4.6 wxt

[Peter <one...@ya...>]

Hello,

I tested in gnuplot 4.6 in Mac.
for "wxt enhanced" terminal,  the buttons such as "Apply the next zoom settings", "Apply the previous zoom settings" 
in the generated plotting  doesn't work.

of course, the square root display as a title doesn't work either in Mac for wxt.

Peter



----- Original Message -----
From: Peter <one...@ya...>
To: "gnu...@li..." <gnu...@li...>
Cc: 
Sent: Monday, June 25, 2012 8:27 AM
Subject: Re: squre root display error in gnuplot 4.6 wxt

Just tested that the title display for square root doesn't work for png and wxt enhanced terminal. 
   set title "y={/Symbol @{\140}\326}x" 


Did I miss something to get it work?

thanks.

Peter


----- Original Message -----
From: Peter <one...@ya...>
To: "gnu...@li..." <gnu...@li...>
Cc: 
Sent: Sunday, June 24, 2012 5:08 PM
Subject: squre root display error in gnuplot 4.6 wxt

Hello,

I just tried gnuplot 4.6, the squre root display for terminal windows enhanced  works fine,
but it doesn't work for wxt enhanced in gnuplot 4.6.

set title "y={/Symbol @{\140}\326}x" 


is there a way to get it work in wxt enhanced terminal?

thanks.

Peter

Re: [Gnuplot-info] is there way to assume the box boundary fixed but let tics move?

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

On 25.06.2012 02:12, Jon wrote:

> I have spent a lot time fixing the size of the boxes in the multiplot
> environment. The issue is basically that for fixed box sizes, the actual
> size to display a graph changes with say ytics width and lmargin.

It's not terribly clear what you mean, because whatever it is you mean 
by "boxes" almost certainly goes by a different name in the gnuplot 
documentation.  But there's a good chance you need to study "help 
lmargin" a bit more closely, and/or update to a current version of gnuplot.

> An illustration of my issue is in the attachment,

No attachment.  The mailing list processor generally doesn't allow any.