gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] (no subject)

[<tmu...@an...>]

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Re: [Gnuplot-info] question

[Hans-Bernhard B. <br...@ph...>]

Tejinder Jindal wrote:
> please tell me how to plot a part of the large number
> of rows in a file

Which part of the rows?  See "help plot datafile", and especially the 
sub-nodes dealing with options 'every', 'index' and 'using'.

[Gnuplot-info] question

[Tejinder J. <tkj...@ya...>]

please tell me how to plot a part of the large number
of rows in a file

Tejinder Kumar Jindal
Lecturer,Aeronautical Engineering Deptt.
Punjab Engg. College
Chandigarh.
India
Resi:house no.812,PEC Campus Chandigarh
Ph.0172-744396


	
	
		
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[Gnuplot-info] bar charts and image map

[Jack A. <ef...@iv...>]

hi,

i'm sure someone has done this before...

i want gnuplot to draw a barchart and return to me the PNG and also the
coordinates of each bar so i can make an image map in HTML.

(the user can click any bar to get more information)

thanks in advance,


jack

Re: [Gnuplot-info] growth rate

[Hans-Bernhard B. <br...@ph...>]

Even Karl wrote:
> I am very embarassed with growth rate calculation with gnuplot.

I can only assume that your use of "embarassed" in this context is a 
language issue.  As is, that statement doesn't really make any sense.

> Is it possible to be returned graphically something like xt/xt-1 (x beeing a
> statistical series) under gnuplot?

"Under" gnuplot: yes.  But not in gnuplot itself.  Gnuplot doesn't do 
on-the-fly modifications of data involving more than text line's worth 
of them (i.e. one "record", see "help glossary").

For modifications like this, use external data processing tools.  E.g.
'awk'.  You can even do that under gnuplot's control, if you're on the 
right kind of platform:

   plot '<awk "{print $1 \"\\t\" $2/xt_m_1; xt_m_1 = $2}" data'

(or something roughly like that).  For better result, write an awk 
script and run it by

	plot '<yourscript data'

[Gnuplot-info] growth rate

[Even K. <kar...@in...>]

Hello,

I am very embarassed with growth rate calculation with gnuplot.
Is it possible to be returned graphically something like xt/xt-1 (x beeing a
statistical series) under gnuplot ?

If there is a solution I am a taker

thanks in advance

Karl

[Gnuplot-info] compiling gnuplot under cygwin

[Paris M. <par...@ya...>]

I've download gnuplot development version via Sourceforge CVS and GD library 
(gd-2.0.33.zip) from http://www.boutell.com/gd.
I am using cygwin 2.125.2.10 (I tried on other version too) on Windows XP pro, 
sp2.

1. extract GD library,
"./configure", than
"make -f makefile" which creates "libgd.a"

2. copy "libgd.a" to /cygwin/lib/
copy "gd.h" to /gnuplot/term/
copy "gd_io.h" and "gdfx.h" to /gnuplot/src/

3. from /gnuplot/config/ to /gnuplot/src/ :
copy "makefile.cyg" as "makefile"
copy "config.cyg" as "config.h"

4. in /gnuplot/src/ type "make -f makefile"


Everything goes well until:

...
gcc -s  -mwindows -mno-cygwin -o wgnuplot.exe \
        alloc.o axis.o binary.o bitmap.o breaders.o color.o command.o contour.o
datafile.o dynarray.o eval.o fit.o gadgets.o getcolor.o graph3d.o graphics.o hel
p.o hidden3d.o history.o internal.o interpol.o matrix.o misc.o mouse.o parse.o p
lot.o plot2d.o plot3d.o pm3d.o readline.o save.o scanner.o set.o show.o specfun.
o standard.o stdfn.o tables.o term.o time.o unset.o util.o util3d.o variable.o v
ersion.o gpexecute.o winmain.o wgnuplib.o wgraph.o wprinter.o wtext.o wpause.o w
menu.o \
        wgplt_res.o -L/usr/local/lib -lkernel32 -lgdi32  -lgd
term.o(.text+0x1eeea):term.c: undefined reference to `_imp__gdImageColorExact@16
'
term.o(.text+0x1eefe):term.c: undefined reference to `_imp__gdImageColorAllocate
@16'
term.o(.text+0x1ef12):term.c: undefined reference to `_imp__gdImageColorClosest@
16'
...
...
term.o(.text+0x218ab):term.c: undefined reference to `_imp__gdImageDestroy@4'
term.o(.text+0x218d2):term.c: undefined reference to `_imp__gdImageGif@8'
term.o(.text+0x218e2):term.c: undefined reference to `_imp__gdImageDestroy@4'
collect2: ld returned 1 exit status
make: *** [wgnuplot.exe] Error 1


Please help!!

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Re: [Gnuplot-info] New at the list (from Argentina)

[<br...@ph...>]

Juanjo Conti wrote:

[...]

> I am here because I would like to know more about GNUplot and maybe have 
> a look at its code.

So why don't you just go ahead and do just that?  The code is available 
to the public --- it should be hard to know anything about gnuplot 
without knowing this little fact, too.  Get yours off 
gnuplot.sourceforge.net or www.gnuplot.info

And, BTW, the program is called 'gnuplot'.  Not GNUplot or any other 
kind of capitalization.  In particular, it's got nothing to do with the 
GNU project.

[Gnuplot-info] New at the list (from Argentina)

[Juanjo C. <jj...@gn...>]

Hi! my name is Juanjo Conti, and I am from Argentina.

I first used GNUplot 4 years ago when I was at secondary school and at 
math class we started to use a privative software called WinFun, I 
wasn't happy with the idea so I look for a free plot software. For those 
days I started with an other friend a proyect call Gleducar 
(http://www.gleducar.org.ar), Gleducar it's about Free Software and 
Education. I have written a little GNUplot tutorial avaliable at: 
http://www.lugli.org.ar/wiki/bin/view/Gleduwiki/ManGNUplot

These months I have been studing Comunications. There is a topic related 
with Fourier squear waves so I used GNUplot for simulating how waves 
should look like as the sum of N armonics. I have also write a shell 
script for genegate my GNUplot scripts and a web-based interface 
(http://www.firebirds.com.ar/fourier).

I am here because I would like to know more about GNUplot and maybe have 
a look at its code.

Greets!

Juanjo, from Santa Fe - Argentina

Re: [Gnuplot-info] Splot 3d data file format

[<br...@ph...>]

abderrazzak EL BOUKILI wrote:
> Please tell me what is the format of the data file for
> splot to plott a real 3d function on 3d mesh. I know hwo to generate a 
> file in a scattered
>   form:
> 
> for x in [x0, xe]
>  for y in [y0,ye]
>   for z in [z0, ze]
>           x  y  z   f(x,y,z)

In gnuplot (and some other tools') parlance, that's actually a 4D 
dataset you're talking about.  gnuplot doesn't really do 4D, also known 
as 'volumetric' data plotting.  It does 3D plotting, i.e. surfaces of 
(almost) arbitrary shapes, and nowadays it can add colour to such 
surfaces, but that's it.

Re: [Gnuplot-info] help!

[Alessandro S. <asa...@ju...>]

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Alessandro Salvatori wrote:

> Valentina Beato wrote:
>
> >Is it possible to control the distance of the tics-marks from the axis?
> >I my case I would like to save space and put the numbers associated
> to the
> >xtics more near to the x-axes, i.e. I would like to move them upwards!
>
> >Thanks
> >Valentina
>
>
> I think you are looking for the offset parameter.
>
> Syntax:
> set xtics {axis | border} {{no}mirror} {{no}rotate {by <ang>}}
> {offset <offset> | nooffset}
> { autofreq
> | <incr>
> | <start>, <incr> {,<end>}
> | ({"<label>"} <pos> {<level>} {,{"<label>"}...) }
> { font "name{,<size>}" }
> { textcolor <colorspec> }
> unset xtics
> show xtics
>
> The <offset> is specified by either x,y or x,y,z, and may be
> preceded by
> `first`, `second`, `graph`, `screen`, or `character` to select the
> coordinate system. <offset> is the offset of the tics texts from their
> default positions, while the default coordinate system is `character`.
> See `coordinates` for details. `nooffset` switches off the offset.
>
> Example:
>
> Move xtics more closely to the plot.
> set xtics offset 0,graph 0.05
>
> viva l'italia ;-P
> ciao

I forgot to mention: you need the CVS version of gnuplot to have that
option!
see the website for instruction to check out and build it...
Alessandro
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Re: [Gnuplot-info] help!

[Alessandro S. <asa...@ju...>]

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Valentina Beato wrote:

>Is it possible to control the distance of the tics-marks from the axis?
>I my case I would like to save space and put the numbers associated to the
>xtics more near to the x-axes, i.e. I would like to move them upwards!
>
>Thanks
>Valentina

I think you are looking for the offset parameter.

 Syntax:
       set xtics {axis | border} {{no}mirror} {{no}rotate {by <ang>}}
                 {offset <offset> | nooffset}
                 {  autofreq
                  | <incr>
                  | <start>, <incr> {,<end>}
                  | ({"<label>"} <pos> {<level>} {,{"<label>"}...) }
                 { font "name{,<size>}" }
                 { textcolor <colorspec> }
       unset xtics
       show xtics

 The <offset> is specified by either x,y or x,y,z, and may be preceded by
 `first`, `second`, `graph`, `screen`, or `character` to select the
 coordinate system. <offset> is the offset of the tics texts from their
 default positions, while the default coordinate system is `character`.
 See `coordinates` for details. `nooffset` switches off the offset.

 Example:

 Move xtics more closely to the plot.
       set xtics offset 0,graph 0.05

viva l'italia ;-P
ciao
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[Gnuplot-info] help!

[Valentina B. <val...@da...>]

Is it possible to control the distance of the tics-marks from the axis?
I my case I would like to save space and put the numbers associated to the 
xtics more near to the x-axes, i.e. I would like to move them upwards!

Thanks 
Valentina

[Gnuplot-info] data file format for pm3d

[Gavin B. <gav...@ya...>]

this is from the help splot - datafile - example
thingy (just type help) 

splot 'datafile.dat'

 where the file "datafile.dat" might contain:

       # The valley of the Gnu.
          0 0 10
          0 1 10
          0 2 10

          1 0 10
          1 1 5
          1 2 10

          2 0 10
          2 1 1
          2 2 10

          3 0 10
          3 1 0
          3 2 10

Hope that helped. You can also splot matrix data....
using splot 'datafile.dat' matrix. Again from the help
pages:

 The `matrix` flag indicates that the ASCII data are
stored in matrix format.
 The z-values are read in a row at a time, i. e.,
       z11 z12 z13 z14 ...
       z21 z22 z23 z24 ...
       z31 z32 z33 z34 ...
 and so forth.  


Gavin.


		
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[Gnuplot-info] Splot 3d data file format

[abderrazzak EL B. <abo...@ho...>]

Please tell me what is the format of the data file for
splot to plott a real 3d function on 3d mesh. I know hwo to generate a file 
in a scattered
   form:

for x in [x0, xe]
  for y in [y0,ye]
   for z in [z0, ze]
           x  y  z   f(x,y,z)

end

PLease tell what to do using pm3d. Thank you very much

Patrick

[Gnuplot-info] an easy way to paint something on the base of a 3d plot?

[<sa...@cr...>]

i'd like to depict the domain of a 2 parameters function by drawing it
in a coloured shape on the basis
(strictly speaking it is not a function but let me simplify)...

i was thinking of having some flat horizontal 3d region defined only out
of the domain, with surface unset and pm2d on the basis, so that i would
get it's horizontal projection drawn in some color on the base...

is there anything less tricky and more efficient?

thank you
alessandro

Re: [Gnuplot-info] timely adding points/segments in plot

[Hans-Bernhard B. <br...@ph...>]

alessandro salvatori wrote:

> i was wondering if it would somehow be possible to attain an animated
> plot where segments in a line are added one after the previous one.
> this would be very nice for demonstations...

gnuplot is not an animation program, so yes, it will flicker if you do 
this in any of the interactive GUI terminals.  The recently added 
animated GIF output may fare better.

To reduce the amount of flickering, you'll have to generally avoid using 
any of the "automagic" behaviours: margins, ranges, tickmarks should all 
be specified to fixed values.

[Gnuplot-info] timely adding points/segments in plot

[alessandro s. <sa...@gm...>]

Hello!

i was wondering if it would somehow be possible to attain an animated
plot where segments in a line are added one after the previous one.
this would be very nice for demonstations...

one naive idea would be to plot "< head -n X dataset" then wait and do
the same for X+1...
but i guess it would flicker quite enough...

thank you very much in advance
Alessandro

Re: [Gnuplot-info] Problem with gnuplot

[Hans-Bernhard B. <br...@ph...>]

DELIMA CHRISTOPHE wrote:
>    I'm working on a project in which I have to draw a representation in 
> three dimensions of a matrix. The only problem I have is that I can't 
> find how to make a good display in which I can see clearly each "peak" 
> and especially to distinguish where do I find higher frequencies.

It's not quite clear what your 3D plot would have to do with 
frequencies.  It looks like you'll want to have a look at 'help pm3d', 
and eventually plot your data as

	set pm3d
	set view map
	splot 'Points.dat' matrix with lines

Another alternative would be

	set view map
	set contour base ; unset surface
	splot 'Points.dat' matrix with lines

[Gnuplot-info] Problem with gnuplot

[DELIMA C. <de...@en...>]

Hello,
    I'm actually student at the university of Nantes and I'm having 
problems with gnuplot.

    I'm working on a project in which I have to draw a representation in 
three dimensions of a matrix. The only problem I have is that I can't 
find how to make a good display in which I can see clearly each "peak" 
and especially to distinguish where do I find higher frequencies.
    To make you see what I have for the moment I'm sending you my file 
.gnu with the different functions I applied. I can't send you the file I 
use with the different frequencies (the file weighs 700 KB) but I wish 
that you could help me. The file "Plots.dat" contains the different 
frequencies I have calculated in a program. The frequencies are sorted 
by x and y as a matrix :
    1  4  6
    8  5  5
    7  3  6
    4  2  9
    (for example).

    I thank you in advance,
    Delima Christophe