gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] Creating a plot per data set

[Morten L. <mor...@no...>]

Hi,

I have a data file with several data sets (separated by double blank 
lines). The number of data sets is unknown on beforehand. I would like 
to create a separate plot of each of these (different color and title). 
An example in the manual (p. 80) showed me how to get a separate color 
for each data set:

plot "test.txt" using 6:5:(column(-2) + 1) with points linecolor 
variable title sprintf("Iteration: %d", (column(-2) + 1))

But it seems like this is just one plot with one title - matching the 
last data set. I have managed to get multiple plots using an iteration, 
but then I have to specify the exact number of iterations:

plot for [i=0:1] "test.txt" index i using 6:5:(column(-2) + 1) with 
points linecolor variable title sprintf("Iteration: %d", i + 1)

Is it possible to have separate plots per data set, without iterating 
over the data before plotting and counting the number of data sets?

Thanks,
Morten

Re: [Gnuplot-info] Outputting data by month

[Mikhail K. <mko...@gm...>]

there are two things involved, tic interval and tic label format.

with set format x "%b %Y" you manually set tic label format to "month 
year". but x tic interval is not changed.

by default x tic interval is calculated by gnuplot automatically based 
on x data range. with automatic x tic interval and a short x range (like 
1-2 months or less) you can get several xtics within one month, like 
2012-12-01, 2012-12-20 or so. As right before you've set format x "%b 
%Y" you will see both tics displayed as "Dec 2012".

This will not happen if xrange is long enough. You can plot some data 
several years long with you script, for example, by making two test data 
points like:
2010-01-01	1.1
2012-06-01	1.2
and check x tics and x tic labels on the resulting plot.

On 07/12/2012 16:26, Victor Porton wrote:
> I have calculated average value of some data for each month (each month during which the data was collected).
>
> I need to display this average data.
>
> Now I have the trouble to display month names at the X-axis. Each month name should be displayed maximum once.
>
> "set format x ''%b %Y" however outputs several major tics with the same label (month name).
>
> Also: if I I display every month name, then I will (a few years later) run out of horizontal space in X-axis to display all month names. What to do?
>

Re: [Gnuplot-info] clustered and stacked

[Leo B. <l_b...@us...>]

Alberich de megres <alb...@gm...> writes:

> [1:text/plain Hide]
>
> Yes, sorry.
>
> I can provide a very simple example. The original algorithm takes  let's
> say 10s to complete. As I devided it into 2 steps, step 1 takes 4s and step
> 2 takes 3s
>
> So the new algorithm will be the result of exacuting step 1 and then step
> 2, and it overall time will now be time to complete step 1 + time to
> complete step 2, in the example, 4+3=7. Now I want to compare it with the
> old one, which takes 10s.
>
> My idea was stack step1 and step2 into one bar (keeping track of each part
> time), and the cluster it the old value. Or in other works, cluster two
> bars but one of them will be the result of stacking step 1 and 2 into one
> bar.
>
> my input file could look like that:
>
> 4 3 10
> 5 6 8
> 8 19 20
> ..
>
>
> Thanks!

I think that my suggestion will do what you want:

>> plot 'data' using ($1+$2) title 'cols 1+2', '' using 3 title 'col 3'

Leo

>
>
>
>
>
>
>
>
>
> On Sun, Dec 9, 2012 at 3:35 PM, Leo Butler
> <l_b...@us...>wrote:
>
>> Alberich de megres <alb...@gm...> writes:
>>
>> > Hello list!
>> >
>> > I'm writing my PhD tesis, and I need to compare some values in an special
>> > way.
>> >
>> > I have 3 columns with numbers, the 3rd columns has a reference measeure
>> > value for the current way the algorithm works. I split it into 2 steps
>> (col
>> > 1 and 2 respectively), so the time for this columns should be added and
>> > compared with the 3rd col.
>>
>> Could you provide a simple example? It seems you have something like
>>
>> # t1 t2 t3
>> 1 2 3
>> 4 5 7
>> etc.
>>
>> Do you intend to add columns 1+2 row-wise? If so:
>>
>> plot 'data' using ($1+$2) title 'cols 1+2', '' using 3 title 'col 3'
>>
>> > And I want to stack the first 2 (so I can still
>> > see the time for each step) and this stacked column cluster it the third
>> > column.
>>
>> I don't understand what you want to do here, since the stacked cols 1
>> and 2 will have twice the number of entries as column 3. An example
>> could clarify.
>>
>> >
>> > I couldn't find anthing about this. Is it possible to do this with
>> gnuplot?
>>
>> Probably with some combination of gnuplot and awk or perl.
>>
>> --
>> Leo Butler                <l_b...@us...>
>> SDF Public Access UNIX System -   http://sdf.lonestar.org
>>
>
> [2:text/html Show]
>

-- 
Leo Butler                <l_b...@us...>
SDF Public Access UNIX System -   http://sdf.lonestar.org

Re: [Gnuplot-info] clustered and stacked

[Alberich de m. <alb...@gm...>]

Yes, sorry.

I can provide a very simple example. The original algorithm takes  let's
say 10s to complete. As I devided it into 2 steps, step 1 takes 4s and step
2 takes 3s

So the new algorithm will be the result of exacuting step 1 and then step
2, and it overall time will now be time to complete step 1 + time to
complete step 2, in the example, 4+3=7. Now I want to compare it with the
old one, which takes 10s.

My idea was stack step1 and step2 into one bar (keeping track of each part
time), and the cluster it the old value. Or in other works, cluster two
bars but one of them will be the result of stacking step 1 and 2 into one
bar.

my input file could look like that:

4 3 10
5 6 8
8 19 20
..


Thanks!









On Sun, Dec 9, 2012 at 3:35 PM, Leo Butler
<l_b...@us...>wrote:

> Alberich de megres <alb...@gm...> writes:
>
> > Hello list!
> >
> > I'm writing my PhD tesis, and I need to compare some values in an special
> > way.
> >
> > I have 3 columns with numbers, the 3rd columns has a reference measeure
> > value for the current way the algorithm works. I split it into 2 steps
> (col
> > 1 and 2 respectively), so the time for this columns should be added and
> > compared with the 3rd col.
>
> Could you provide a simple example? It seems you have something like
>
> # t1 t2 t3
> 1 2 3
> 4 5 7
> etc.
>
> Do you intend to add columns 1+2 row-wise? If so:
>
> plot 'data' using ($1+$2) title 'cols 1+2', '' using 3 title 'col 3'
>
> > And I want to stack the first 2 (so I can still
> > see the time for each step) and this stacked column cluster it the third
> > column.
>
> I don't understand what you want to do here, since the stacked cols 1
> and 2 will have twice the number of entries as column 3. An example
> could clarify.
>
> >
> > I couldn't find anthing about this. Is it possible to do this with
> gnuplot?
>
> Probably with some combination of gnuplot and awk or perl.
>
> --
> Leo Butler                <l_b...@us...>
> SDF Public Access UNIX System -   http://sdf.lonestar.org
>

Re: [Gnuplot-info] clustered and stacked

[Leo B. <l_b...@us...>]

Alberich de megres <alb...@gm...> writes:

> Hello list!
>
> I'm writing my PhD tesis, and I need to compare some values in an special
> way.
>
> I have 3 columns with numbers, the 3rd columns has a reference measeure
> value for the current way the algorithm works. I split it into 2 steps (col
> 1 and 2 respectively), so the time for this columns should be added and
> compared with the 3rd col. 

Could you provide a simple example? It seems you have something like

# t1 t2 t3
1 2 3
4 5 7
etc.

Do you intend to add columns 1+2 row-wise? If so:

plot 'data' using ($1+$2) title 'cols 1+2', '' using 3 title 'col 3'

> And I want to stack the first 2 (so I can still
> see the time for each step) and this stacked column cluster it the third
> column.

I don't understand what you want to do here, since the stacked cols 1
and 2 will have twice the number of entries as column 3. An example
could clarify.

>
> I couldn't find anthing about this. Is it possible to do this with gnuplot?

Probably with some combination of gnuplot and awk or perl. 

-- 
Leo Butler                <l_b...@us...>
SDF Public Access UNIX System -   http://sdf.lonestar.org

[Gnuplot-info] clustered and stacked

[Alberich de m. <alb...@gm...>]

Hello list!

I'm writing my PhD tesis, and I need to compare some values in an special
way.

I have 3 columns with numbers, the 3rd columns has a reference measeure
value for the current way the algorithm works. I split it into 2 steps (col
1 and 2 respectively), so the time for this columns should be added and
compared with the 3rd col. And I want to stack the first 2 (so I can still
see the time for each step) and this stacked column cluster it the third
column.

I couldn't find anthing about this. Is it possible to do this with gnuplot?

thanks!

[Gnuplot-info] Outputting data by month

[Victor P. <po...@na...>]

I have calculated average value of some data for each month (each month during which the data was collected).

I need to display this average data.

Now I have the trouble to display month names at the X-axis. Each month name should be displayed maximum once.

"set format x ''%b %Y" however outputs several major tics with the same label (month name).

Also: if I I display every month name, then I will (a few years later) run out of horizontal space in X-axis to display all month names. What to do?

-- 
Victor Porton - http://portonvictor.org

Re: [Gnuplot-info] Question on function plot

[Mikhail K. <mko...@gm...>]

On 02/12/2012 17:35, Mohammad Javad Abedini wrote:
> plot [0,100] [0:10] 0.45415*x^0.6 with points 12, 0.46714*x^(2/3) with lines 3

plot [0:100] [0:10] 0.45415*x**0.6 with points pointtype 12, 
0.46714*x**(2.0/3.0) with lines linetype 3

[Gnuplot-info] Question on function plot

[Mohammad J. A. <ab...@sh...>]

Dear folks

Line 21 of my gnuplot file is:

plot [0,100] [0:10] 0.45415*x^0.6 with points 12, 0.46714*x^(2/3) with lines 3

As soon as I execute gnuplot, I will get the following error:

"temp.plt", line 21: non-integer passed to boolean operator

Any advice would be greatly appreciated.

Thanks
Abedini

[Gnuplot-info] How to subscribe

[Mohammad J. A. <ab...@sh...>]

Dear Sir:

Could it be possible to let me know how to subscribe to gnuplot mailing list?

Thanks
Abedini

Re: [Gnuplot-info] Linestyle or Linetype with Objects?

[Philipp K. J. <ja...@ie...>]

Thanks.

On Tuesday 27 November 2012 13:46:47 Mikhail Kononets wrote:
> "help fillstyle" gives some info.
> 
> On 27/11/2012 22:05, Philipp K. Janert wrote:
> > On Tuesday 27 November 2012 12:36:31 Mikhail Kononets wrote:
> >> more elaborate object specification:
> >> 
> >> set object 1 circle at 0,0 size 0.4 fc rgb "red" fs transparent solid
> >> 0.3 border lc rgb "blue" lw 3.0
> > 
> > Are all these options documented somewhere?
> > Neither help object, nor help circle seem to
> > produce information on "border", for instance.
> > 
> >> On 27/11/2012 21:03, Mikhail Kononets wrote:
> >>> set object 1 circle at 0,0 size 1 fc lt 0
> >>> 
> >>> produces a black circle for me (gnuplot 4.4.3)
> >>> 
> >>> On 27/11/2012 20:03, Philipp K. Janert wrote:
> >>>> Is there a way to set the linetype or style for an object?
> >>>> 
> >>>> Something like this:
> >>>> set object 1 circle at 0,0 size 1 lt 0
> >>>> does not seem to work:
> >>>> Unrecognized or duplicate option
> >>>> 
> >>>> (At least in gnuplot 4.4.)
	

Re: [Gnuplot-info] Linestyle or Linetype with Objects?

[Mikhail K. <mko...@gm...>]

"help fillstyle" gives some info.

On 27/11/2012 22:05, Philipp K. Janert wrote:
> On Tuesday 27 November 2012 12:36:31 Mikhail Kononets wrote:
>> more elaborate object specification:
>>
>> set object 1 circle at 0,0 size 0.4 fc rgb "red" fs transparent solid
>> 0.3 border lc rgb "blue" lw 3.0
>
> Are all these options documented somewhere?
> Neither help object, nor help circle seem to
> produce information on "border", for instance.
>
>>
>> On 27/11/2012 21:03, Mikhail Kononets wrote:
>>> set object 1 circle at 0,0 size 1 fc lt 0
>>>
>>> produces a black circle for me (gnuplot 4.4.3)
>>>
>>> On 27/11/2012 20:03, Philipp K. Janert wrote:
>>>> Is there a way to set the linetype or style for an object?
>>>>
>>>> Something like this:
>>>> set object 1 circle at 0,0 size 1 lt 0
>>>> does not seem to work:
>>>> Unrecognized or duplicate option
>>>>
>>>> (At least in gnuplot 4.4.)

Re: [Gnuplot-info] Linestyle or Linetype with Objects?

[Philipp K. J. <ja...@ie...>]

On Tuesday 27 November 2012 12:36:31 Mikhail Kononets wrote:
> more elaborate object specification:
> 
> set object 1 circle at 0,0 size 0.4 fc rgb "red" fs transparent solid
> 0.3 border lc rgb "blue" lw 3.0

Are all these options documented somewhere?
Neither help object, nor help circle seem to
produce information on "border", for instance.

> 
> On 27/11/2012 21:03, Mikhail Kononets wrote:
> > set object 1 circle at 0,0 size 1 fc lt 0
> > 
> > produces a black circle for me (gnuplot 4.4.3)
> > 
> > On 27/11/2012 20:03, Philipp K. Janert wrote:
> >> Is there a way to set the linetype or style for an object?
> >> 
> >> Something like this:
> >> set object 1 circle at 0,0 size 1 lt 0
> >> does not seem to work:
> >> Unrecognized or duplicate option
> >> 
> >> (At least in gnuplot 4.4.)

Re: [Gnuplot-info] Linestyle or Linetype with Objects?

[Philipp K. J. <ja...@ie...>]

On Tuesday 27 November 2012 12:03:35 you wrote:
> set object 1 circle at 0,0 size 1 fc lt 0
> 
> produces a black circle for me (gnuplot 4.4.3)

For me, too. 

Which is not good. lt 0 should be a minimally dotted line.

> 
> On 27/11/2012 20:03, Philipp K. Janert wrote:
> > Is there a way to set the linetype or style for an object?
> > 
> > Something like this:
> > 	set object 1 circle at 0,0 size 1 lt 0
> > 
> > does not seem to work:
> > 	Unrecognized or duplicate option
> > 
> > (At least in gnuplot 4.4.)

Re: [Gnuplot-info] Linestyle or Linetype with Objects?

[Mikhail K. <mko...@gm...>]

more elaborate object specification:

set object 1 circle at 0,0 size 0.4 fc rgb "red" fs transparent solid 
0.3 border lc rgb "blue" lw 3.0

On 27/11/2012 21:03, Mikhail Kononets wrote:
> set object 1 circle at 0,0 size 1 fc lt 0
>
> produces a black circle for me (gnuplot 4.4.3)
>
> On 27/11/2012 20:03, Philipp K. Janert wrote:
>>
>> Is there a way to set the linetype or style for an object?
>>
>> Something like this:
>> set object 1 circle at 0,0 size 1 lt 0
>> does not seem to work:
>> Unrecognized or duplicate option
>>
>> (At least in gnuplot 4.4.)
>

-- 
Mikhail Kononets
Ph.D. Student
Marine Chemistry
Department of Chemistry and Molecular Biology
University of Gothenburg
Kemivagen 10
SE-412 96
Gothenburg, Sweden
office num.: +46-31-786-9063
mobile num.: +46-70-216-0936
e-mail: m.k...@ch...
         mko...@gm...

Re: [Gnuplot-info] Linestyle or Linetype with Objects?

[Mikhail K. <mko...@gm...>]

set object 1 circle at 0,0 size 1 fc lt 0

produces a black circle for me (gnuplot 4.4.3)

On 27/11/2012 20:03, Philipp K. Janert wrote:
>
> Is there a way to set the linetype or style for an object?
>
> Something like this:
> 	set object 1 circle at 0,0 size 1 lt 0
> does not seem to work:
> 	Unrecognized or duplicate option
>
> (At least in gnuplot 4.4.)

[Gnuplot-info] Linestyle or Linetype with Objects?

[Philipp K. J. <ja...@ie...>]

Is there a way to set the linetype or style for an object?

Something like this:
	set object 1 circle at 0,0 size 1 lt 0
does not seem to work:
	Unrecognized or duplicate option

(At least in gnuplot 4.4.)

[Gnuplot-info] histogram as polar plot

[Oberwittler, D. <d.o...@mp...>]

Dear list members,

can gnuplot turn a simple bar chart (histogram) with data from a 
.dat-file  into a circular polar plot, like the examples on this page show:
http://scienceoss.com/categories/python/matplotlib/

I have seen examples in gnuplot using functions, but not simple using 
bars representing data points.

a basic example for the histogram would be:

*********************************
reset
set xlabel "category"
set ylabel "value"
set grid
set xrange [0:7]
set yrange [0:10]
set style data boxes
set style fill solid 1.0
set boxwidth 0.95 relative
plot "temp1.dat" u 1:2 w boxes
**********************************

where the data is:
==================================
1 7.5
2 5.8
3 7.9
4 4.2
5 5.0
6 7.7
=================================

Any tipps are appreciated!

Many thanks

Dietrich

Re: [Gnuplot-info] splot x,y,z,color w pm3d

[Mikhail K. <mko...@gm...>]

for the last two examples at 
http://gnuplot.sourceforge.net/demo/heatmaps.html, i think the "splot" 
command needs an argument of 1:2:3:4 which is a regular grid of 
parameter 3 and parameter 4 at 1:2, with no blank lines.

other important instructions are:
set pm3d ...
set view ...
set contour ...

the examples are straightforward and understandable but very concise so 
be careful.

On 24/11/2012 02:04, James Cloos wrote:
>>>>>> "MK" == Mikhail Kononets<mko...@gm...>  writes:
>
> MK>  does the demo http://gnuplot.sourceforge.net/demo/heatmaps.html explain
> MK>  what you are looking for? see last two examples.
>
> Argh.  I missed that.
>
> I thought I had tried using 1:2:3:4, but perhaps only with the existing files
> (which lack blank lines; they are just lists of points).
>
> I take it then that all I need to do is to sort the files to create iso-lines
> and add blanks between those, yes?
>
> Sort(1) should handle the sorting; I'll just need to write a simple program
> which adds a blank line whenever a specified column changes value.
>
> Thanks.
>
> -JimC

Re: [Gnuplot-info] splot x,y,z,color w pm3d

[James C. <clo...@jh...>]

>>>>> "MK" == Mikhail Kononets <mko...@gm...> writes:

MK> does the demo http://gnuplot.sourceforge.net/demo/heatmaps.html explain 
MK> what you are looking for? see last two examples.

Argh.  I missed that.

I thought I had tried using 1:2:3:4, but perhaps only with the existing files
(which lack blank lines; they are just lists of points).

I take it then that all I need to do is to sort the files to create iso-lines
and add blanks between those, yes?

Sort(1) should handle the sorting; I'll just need to write a simple program
which adds a blank line whenever a specified column changes value.

Thanks.

-JimC
-- 
James Cloos <cl...@jh...>         OpenPGP: 1024D/ED7DAEA6

Re: [Gnuplot-info] splot x,y,z,color w pm3d

[Mikhail K. <mko...@gm...>]

Hi James

does the demo http://gnuplot.sourceforge.net/demo/heatmaps.html explain 
what you are looking for? see last two examples.

Mikhail

On 22/11/2012 01:17, James Cloos wrote:
> I'd like to do pm3d splots of datafiles using three columns for x, y, z
> and a fourth column for the color at that point.
>
> Can gnuplot do that without first pre-processing the data into datablocks?
>
> If not, what should the files look like to specify a colour independent of
> the third (aka z) column?
>
> -JimC

[Gnuplot-info] splot x,y,z,color w pm3d

[James C. <clo...@jh...>]

I'd like to do pm3d splots of datafiles using three columns for x, y, z
and a fourth column for the color at that point.

Can gnuplot do that without first pre-processing the data into datablocks?

If not, what should the files look like to specify a colour independent of
the third (aka z) column?

-JimC
-- 
James Cloos <cl...@jh...>         OpenPGP: 1024D/ED7DAEA6

[Gnuplot-info] filledcurves with gradient fill?

[Mikhail K. <mko...@gm...>]

Hi all.

Does anyone by a chance knows a less crude way to get a dataset plotted 
as "filledcurves" with gradient fill, other than used by me?

My code and the plot are attached. With my code only one dataset is 
possible obviously, and i would like to be able plot more than one.

thank you,
Mikhail

set term pngcairo enhanced font "Helvetica,12" size 500,200
set datafile separator "\t"

set xdata time
set timefmt "%b %d, %Y %H:%M"
set xrange ["Oct 27, 2012 00:00" to "Nov 27, 2012 00:00"]
set format x "%b %d"

set table
set output "/dev/null"
set timefmt "%Y-%m-%d %H:%M:%SZ"
plot \
   "Loven_Wind_data.txt" \
   using 1:6
unset table

X_MAX=GPVAL_X_MAX
X_MIN=GPVAL_X_MIN
DATA_X_MAX=GPVAL_DATA_X_MAX
DATA_X_MIN=GPVAL_DATA_X_MIN

set output "TEST01-10-sensor_data-11-temperature.png"

set lmargin at screen 0.1
set rmargin at screen 0.95
set tmargin at screen 0.90
set bmargin at screen 0.10

A = -20
B = 25
set yrange [A to B]

set multiplot

unset ytics
unset y2tics
unset xtics
set key off

set pm3d map
set palette defined ( -20.0 "black", -5.0 "blue", 0.0 "white", 10.0 
"red", 25.0 "black" )
unset colorbox
set isosamples 200
splot y notitle
unset pm3d

if (X_MAX>DATA_X_MAX) \
   set timefmt "%s"; \
   set object 1 rectangle from DATA_X_MAX, graph 0 to graph 1, graph 1 
fc rgb "white" fs solid 1.0 border; \
   plot 0/0 notitle; \
   unset object 1
if (X_MIN<DATA_X_MIN) \
   set timefmt "%s"; \
   set object 1 rectangle from graph 0, graph 0 to DATA_X_MIN, graph 1 
fc rgb "white" fs solid 1.0 border; \
   plot 0/0 notitle; \
   unset object 1

set timefmt "%Y-%m-%d %H:%M:%S"
plot \
   "Loven_Wind_data.txt" \
       using 1:($5>0 ? $5 : 0):(25) w filledcurves below fc rgb "white" 
notitle, \
   ""  using 1:($5<=0 ? $ 5 : 0):(-20) w filledcurves above fc rgb 
"white" notitle

set ylabel "Air temperature, C"
set border
set ytics -20,10
set xtics
set grid
plot \
   "Loven_Wind_data.txt" \
   using 1:5 w l lt -1 notitle

unset multiplot
unset output

[Gnuplot-info] Question involving using gnuplot with iozone3 data (old-to-new .dem file conversion)

[Patrick W. <pat...@gm...>]

Hey all,

I'm trying to use iozone to perform some disk benchmarks on Ubuntu
11.10.  The problem is that, although iozone has scripts to automatically
generate plots in gnuplot, http://www.iozone.org/src/current/gnu3d.dem is
for out-of-date gnuplot (to my knowledge).

I haven't found a (working) solution/patch, although I found a number of
non-working ones!  I'm not sure what I need to do to gnu3d.dem to make it
work with gnuplot 4.4 patchlevel 3

Any ideas?

Thanks in advance,
Pat Wilbur


--
Patrick F. Wilbur
Computer Science Graduate at Clarkson University

pat...@gm...
wil...@cl...

Check out our book: http://runningxen.com
My website: http://pdub.net

Re: [Gnuplot-info] how to thin out textual xticlabels?

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

On 15.11.2012 14:35, sabretoothedhamster wrote:
> But if I try to show the time values (from the first column, by "using
> ($0):4:xticlabels(1)") instead of line numbers then gnuplot goes mad.

Not really.  It just does exactly what you asked it to.  So whatever 
madness may have ensued: it was caused by you.

What did you expect to happen when you added "xticslabels(1)", other 
than what the documentation clearly says it does: put a tick label at 
every data point?  On what basis did you conclude this would be a useful 
thing to do in this use case?

> How can I force gnuplot to thin textual labels out?

Only by thinning out the data.  See "every".