gnuplot-info — For questions and discussion about gnuplot

Re: [Gnuplot-info] gnuplot question

[<Die...@t-...>]

Hi Dave,
I do not entirely understand your issue. You have a C program generating da=
ta=20
(i.e. threed.dat) having a subroutine writing a plotfile for gnuplot (i.e.=
=20
threed.plt) and then do a
system ("gnuplot threed.plt");
and this does not work?
Or is your problem related to the three-D plotting?
Please give more information to help!
Take care


Dieter

Am Montag, 17. Mai 2004 21:47 schrieb Dave Anderson:
> Hi,
> I am trying to use gnuplot to output 3-dimensional images from a C progra=
m,
***

=2D-=20
=2D----------------------------------------------------------

                               |
                                \
                 /\_/\           |
                | ~x~ |/-----\   /
                 \   /-       \_/
  ^^__   _        /  _  ____   /
 <=B0=B0__ \- \_/     |  |/    |  |
  ||  ||         _| _|    _| _|

if you really want to see the pictures above - use some font
with constant spacing like courier! :-)
=2D----------------------------------------------------------

RE: [Gnuplot-info] Gathering Errors in Batch mode

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

On Tue, 18 May 2004, Lauren Clarke wrote:

> Interesting idea... If no one sees any immediate roadblocks to this, I might
> just try it. 
> 
> I'm not all that familiar with the innards of gnuplot, but have utilized
> cygwin before. Anyone have any hunches which environment (mingw, or cygwin)
> would be the most likely to yield results?

Either will, because they're essentially the same thing.  You can use the
Win32+X11 binary provided on our download sites, I think.


-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

RE: [Gnuplot-info] Gathering Errors in Batch mode

[Lauren C. <la...@co...>]

Interesting idea... If no one sees any immediate roadblocks to this, I might
just try it. 

I'm not all that familiar with the innards of gnuplot, but have utilized
cygwin before. Anyone have any hunches which environment (mingw, or cygwin)
would be the most likely to yield results?

Thanks Dave.
-lc

> -----Original Message-----
> From: Dave Denholm [mailto:dde...@es...]
> Sent: Tuesday, May 18, 2004 7:55 AM
> To: Lauren Clarke
> Cc: gnu...@li...
> Subject: Re: [Gnuplot-info] Gathering Errors in Batch mode
> 
> "Lauren Clarke" <la...@co...> writes:
> 
> > Hi All,
> >
> > Apologies if this is an FAQ, but I'm in the process of integrating
> version 4
> > into our gnuplot-enabled web applications and have the same question I
> had
> > back in 2000 (on ver 3.7).
> >
> > When running on MS Windows, is there any mechanism whereby the errors
> that
> > would be displayed in interactive mode (with LOAD), can be sent to a
> file
> > when running in batch mode? Or, perhaps more simply, what is the proper
> way
> > to get error messages in batch mode?
> >
> 
> If you're running batch mode, and you don't need the windows terminal
> type, have you considered (trying to) build a mingw or cygwin version
> of gnuplot. This may behave more like you'd expect.
> 
> 
> dd
> --
> Dave Denholm              <dde...@es...>
> http://www.esmertec.com

Re: [Gnuplot-info] Gathering Errors in Batch mode

[Dave D. <dde...@es...>]

"Lauren Clarke" <la...@co...> writes:

> Hi All, 
>
> Apologies if this is an FAQ, but I'm in the process of integrating version 4
> into our gnuplot-enabled web applications and have the same question I had
> back in 2000 (on ver 3.7).
>
> When running on MS Windows, is there any mechanism whereby the errors that
> would be displayed in interactive mode (with LOAD), can be sent to a file
> when running in batch mode? Or, perhaps more simply, what is the proper way
> to get error messages in batch mode?
>

If you're running batch mode, and you don't need the windows terminal
type, have you considered (trying to) build a mingw or cygwin version
of gnuplot. This may behave more like you'd expect.


dd
-- 
Dave Denholm              <dde...@es...>       http://www.esmertec.com

Re: [Gnuplot-info] parts chart

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

On Mon, 17 May 2004, Dan Jacobson wrote:

[Please restrict yourself to posting to *one* mailing list.  
Cross-posting is bad enough in Usenet, we really don't need it in mailing
lists.]

> Maybe as quick way to find how to adjust different parts of a graph,
> there should be distributed in the docs some .png files with arrows
> pointing to each part of a graph, with names of that part.

That could be *very* hard to do, given the large number of output format
the documentation is available in.  Supplying it as a generatable 
plot like the 'test' page, might work better.  Actually, it'd probably
best be done as a demo script.

> E.g. it took me an hour to find out the name of the part that was
> bothering me was "key", I needed to unset "key", and not "title",
> "label" etc.

"help glossary" would have gotten you there a lot faster ;-|

> Splotting a sphere looks squashed.  I don't know how you can convey
> whatever one needs to do to unsquash it on the diagram I call for
> above, unless it is axis related...

That would be impossible to show in a single page, anyway.  The solution
is

	set size square
	set ticslevel 0

In spite of the docs saying 'set size square' doesn't affect 3D plots, it
does.

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

Re: [Gnuplot-info] gnuplot question

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

On Mon, 17 May 2004, Dave Anderson wrote:

> Hi,
> I am trying to use gnuplot to output 3-dimensional images from a C program, 
> but am having little success in doing so.  Any help would be greatly 
> appreciated,

It's hard, if not impossible, to help without knowing where exactly
your problem is.  Tell us what you tried, and how it fails.  Knowing
the platform you're on might help, too.


-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

[Gnuplot-info] parts chart

[Dan J. <ji...@ji...>]

Maybe as quick way to find how to adjust different parts of a graph,
there should be distributed in the docs some .png files with arrows
pointing to each part of a graph, with names of that part.

E.g. it took me an hour to find out the name of the part that was
bothering me was "key", I needed to unset "key", and not "title",
"label" etc.

Splotting a sphere looks squashed.  I don't know how you can convey
whatever one needs to do to unsquash it on the diagram I call for
above, unless it is axis related...

[Gnuplot-info] gnuplot question

[Dave A. <dav...@ho...>]

Hi,
I am trying to use gnuplot to output 3-dimensional images from a C program, 
but am having little success in doing so.  Any help would be greatly 
appreciated,
Thanks,
-Dave

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RE: [Gnuplot-info] Gathering Errors in Batch mode

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

On Sun, 16 May 2004 li...@co... wrote:

> At this point, I'm not sure if it's the OS or wgnuplot_pipes. 

The latter.  The OS (or more precisely: the command line shell) should
know what to do with 2>.

> Are there any docs for wgnuplot_pipes, or shall I inspect the source?

I'm not aware of any docs other than what Petr may have put into the
README of the binary package.

> Given what I've read about wgnuplot_pipes, it seems like this would be a
> pretty standard use-case, it's a shame to have my hopes dashed at this
> point, but I've lived this long without it, I suppose I can continue ;-).

Actually, the major use case is to have a gnuplot on Windows that supports
piping from within, as in back-tick expansion, data file filtering and
output to pipes:

	set title `my_title_generator`
	set out "| lpr -P myprinter"
	plot '< awk -f myscript datafile'

The fact that it causes wgnuplot to display a console is a side-effect
of the actual modification.

In the end, I suspect we'ld have to rewrite large parts of, possibly the
entire MS Windows text output routines in gnuplot (i.e. src/win/wtext.c).
I once started down that road, but never made it very far, and didn't 
publish the results.

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

RE: [Gnuplot-info] Gathering Errors in Batch mode

[<li...@co...>]

Hi Hans-Bernhard, 

Thanks for the quick reply. 

If, by "redirect its stderr the usual way" you mean something like:

wgnuplot_pipes test.gnu 2>errors.txt

I'm not getting it to work. In the case above, I get an empty errors.txt
file (regardless of whether the test.gnu has an error or not). 

At this point, I'm not sure if it's the OS or wgnuplot_pipes. Are there any
docs for wgnuplot_pipes, or shall I inspect the source?

Given what I've read about wgnuplot_pipes, it seems like this would be a
pretty standard use-case, it's a shame to have my hopes dashed at this
point, but I've lived this long without it, I suppose I can continue ;-).

-lc

> -----Original Message-----
> From: gnu...@li... [mailto:gnuplot-info-
> ad...@li...] On Behalf Of Hans-Bernhard Broeker
> Sent: Saturday, May 15, 2004 4:17 PM
> To: Lauren Clarke
> Cc: gnu...@li...
> Subject: Re: [Gnuplot-info] Gathering Errors in Batch mode
> 
> On Sat, 15 May 2004, Lauren Clarke wrote:
> 
> > When running on MS Windows, is there any mechanism whereby the errors
> that
> > would be displayed in interactive mode (with LOAD), can be sent to a
> file
> > when running in batch mode? Or, perhaps more simply, what is the proper
> way
> > to get error messages in batch mode?
> 
> If you use wgnuplot_pipes.exe from the distributed Win32 binary package, I
> think you can just redirect its stderr the usual way.  If not, then I
> would presume it's still just as impossible as it always was. ;-(
> 
> --
> Hans-Bernhard Broeker (br...@ph...)
> Even if all the snow were burnt, ashes would remain.
> 
> 
> 
> 
> -------------------------------------------------------
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Re: [Gnuplot-info] Gathering Errors in Batch mode

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

On Sat, 15 May 2004, Lauren Clarke wrote:

> When running on MS Windows, is there any mechanism whereby the errors that
> would be displayed in interactive mode (with LOAD), can be sent to a file
> when running in batch mode? Or, perhaps more simply, what is the proper way
> to get error messages in batch mode?

If you use wgnuplot_pipes.exe from the distributed Win32 binary package, I 
think you can just redirect its stderr the usual way.  If not, then I
would presume it's still just as impossible as it always was. ;-(

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

[Gnuplot-info] Gathering Errors in Batch mode

[Lauren C. <la...@co...>]

Hi All, 

Apologies if this is an FAQ, but I'm in the process of integrating version 4
into our gnuplot-enabled web applications and have the same question I had
back in 2000 (on ver 3.7).

When running on MS Windows, is there any mechanism whereby the errors that
would be displayed in interactive mode (with LOAD), can be sent to a file
when running in batch mode? Or, perhaps more simply, what is the proper way
to get error messages in batch mode?

Thanks, 

-lc 

PS: Congrats on version 4 BTW. It's been a very smooth transition thus far,
and I'm seeing substantial performance increases, not to mention new
features I'm sure will be useful.

[Gnuplot-info] pattern length of dashed line

[<fl...@pl...>]

Hi,
I would like to change the pattern length of the dashed line, or the 
ot-dashed line to a longer dash for the postscript terminal. Is this 
possible to do over the linetype option ?
I really appreciate the help of this mailing list,
Thanks
Flo

Re: [Gnuplot-info] key title color, and border around symbols

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

On Fri, 14 May 2004 fl...@pl... wrote:

> Hi,
> I have two questions regarding symbol colors:
> 
> Gnuplot seems to change the textcolor in the key (legend) to eth color of 
> the symbol. 

It'll do that only if the terminal supports coloured text.  You can
disable that for the postscript terminal using the 'blacktext' option.,

That's all the control  you currently have over the key entry text colour
in gnuplot.

> Is it possible to have a symbol filled with one color with a border 
> around the symbol of a different color. 

Not if you want the fill colour to be anything else but white.
There are white-filled versions of most symbols in the PostScript
driver.

> I run into this problem when a few 
> datapoints are close to each other, they overlap, and one can't recognize 
> the shape anymore. 

Don't fill them then.  Filling means more ink on the paper, increasing
the risk of symbols overpainting each other until they're no longer
decipherable.

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

[Gnuplot-info] key title color, and border around symbols

[<fl...@pl...>]

Hi,
I have two questions regarding symbol colors:

Gnuplot seems to change the textcolor in the key (legend) to eth color of 
the symbol. When I use:

set terminal postscript eps color
set output 'test.eps'
plot  'testdata.dat' t 'SIN' w p lt 9 pt 9

I get the symbols as I want grey and filled, but the title entry text, in 
this case "SIN", is in grey letters in the key. Is there any way 
to set the 
key textcolor ?

Is it possible to have a symbol filled with one color with a border 
around the symbol of a different color. I run into this problem when a few 
datapoints are close to each other, they overlap, and one can't recognize 
the shape anymore. One way out is not to fill them at all, but I'd like to 
fill them e.g. grey and border them black ?

Thanks a lot, Any hints for directions to look into are appreciated.
Flo

Re: [Gnuplot-info] (no subject)

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

On Mon, 3 May 2004 er...@ne... wrote:

[Can you please hit <Return> every once in a while?  Your entire
mail was in only two lines of text, originally.  That's way too long.]

>   I recently purchased Red-Hat linux and have a dual-boot arrangement
> with Windows XP. Going through all the Unix commands for the first time,
> came upon gnuplot. Question (I emphasize that I did spend some time in
> the help manual, couldn't readily come up with the answer): is there an
> easy, or even moderately difficult way to either a) save a plot as an
> html or tiff file,

No.  Plots aren't web pages.  They can become *part* of a webpage though,
which is why gnuplot supports output as GIF or PNG files.  That should
handle your TIFF question, too.

> or redirect it to same (I tried the usual
> re-direction of the command ('>') and got an error msg.).

What error message exactly?  Remember you're not on Windows, so there's a
solid chance that error messages actually *mean* somehting.

> Can I use the vi editor to read in the graphic (plot) some way? In other
> words, can these plots be used in text files, e.g.,as part of a paper?

Huh?  Since when would papers have to be published as raw text?  Ever
learned of text processors, and their capabilities of including graphics
from external files?

To that end, gnuplot can write out graphics as postscript files, or as TeX
files with integrated PostScript fragments.  See "help postscript" and
"help pslatex".

Re: [Gnuplot-info] Question

[<Die...@t-...>]

Dear Nicolas,
running gnuplot, help fit is your friend ;-). I could even have said RTFM.=
=20
gnuplot >
gnuplot > help fit
*****
Examples:
       f(x) =3D a*x**2 + b*x + c
       g(x,y) =3D a*x**2 + b*y**2 + c*x*y
       FIT_LIMIT =3D 1e-6
       fit f(x) 'measured.dat' via 'start.par'
       fit f(x) 'measured.dat' using 3:($7-5) via 'start.par'
       fit f(x) './data/trash.dat' using 1:2:3 via a, b, c
       fit g(x,y) 'surface.dat' using 1:2:3:(1) via a, b, c

 After each iteration step, detailed information about the current state
 of the fit is written to the display.  The same information about the
 initial and final states is written to a log file, "fit.log".  This file
 is always appended to, so as to not lose any previous fit history;  it
 should be deleted or renamed as desired. By using the command=20
 `set fit logfile`, the name of the log file can be changed.
****
info gnuplot in a shell environment may also help.
Take care


Dieter


Am Sonntag, 25. April 2004 02:00 schrieb Nicolas Busca:
> Hi! First, I'd like to congratulate gnuplot developers for such a
****

=2D-=20
=2D----------------------------------------------------------

                               |
                                \
                 /\_/\           |
                | ~x~ |/-----\   /
                 \   /-       \_/
  ^^__   _        /  _  ____   /
 <=B0=B0__ \- \_/     |  |/    |  |
  ||  ||         _| _|    _| _|

if you really want to see the pictures above - use some font
with constant spacing like courier! :-)
=2D----------------------------------------------------------

Re: [Gnuplot-info] Need help to compile gnuplot with gd-2.0.23

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

On Fri, 7 May 2004, Lavoie,Alain [CMC] wrote:


> make[2]: Entering directory `/opt/sources/graphic/gnuplot-3.8k.2/tutorial'
> ../src/gnuplot: error while loading shared libraries: libgd.so.2: cannot
> open shared object file: No such file or directory

The error message is pretty clear, really: gd-2.0.23 was built as a shared
library, but it's not in any place where the linker defaults to look, so
it's not found.

IMHO, that means you haven't really "installed" libgd, yet.  As a
temporary measure, you'ld have to set LD_LIBRARY_PATH (or some similar
thing, depending on what your undisclosed host platform happens to be) to
include the place your libgd.so.2 is currently sleeping.

Using GNU "libtool" in our build process would probably improve this
situation, but gnuplot doesn't use that yet.

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

[Gnuplot-info] Need help to compile gnuplot with gd-2.0.23

[Lavoie,Alain [CMC] <Ala...@ec...>]

Hi,

	I installed gd-2.0.23 and after I tried to install gnuplot-3.8k.2
and gnuplot-3.8k.3 and gnuplot-4.0.0
Everytime I got this error in the make step.

make[2]: Entering directory `/opt/sources/graphic/gnuplot-3.8k.2/tutorial'
../src/gnuplot: error while loading shared libraries: libgd.so.2: cannot
open shared object file: No such file or directory
make[2]: *** [eg1.tex] Error 127
make[2]: Leaving directory `/opt/sources/graphic/gnuplot-3.8k.2/tutorial'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/opt/sources/graphic/gnuplot-3.8k.2'
make: *** [all] Error 2

My configure is: ./configure --prefix=/opt/gnuplot
Previously I installed gd-1.8 and gnuplot-3.8k.2 without any problem. But
with the new gd I can't.
Can you help me.


	Thanks!
	_______
	Alain 

Re: [Gnuplot-info] Question

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

On Sat, 24 Apr 2004, Nicolas Busca wrote:

> My question (that I couldn't find in the FAQ) is: "How do I store the
> output of a "fit" in a  file?, i.e. the fitting parameters, chi2, etc.?

You don't have to --- gnuplot already does that. It's called "fit.log". I
wonder how you managed to miss that when you read the documentation. You
*did* read it, didn't you?
-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

Re: [Gnuplot-info] help gnuplot

[<Die...@t-...>]

Dear Daniele,
this will not work without an extra script. Gnuplot cannot do this for you=
=20
AFAIK. Use awk, pearl, whatever to generate an appropriate format.
Take care



Dieter

Am Donnerstag, 6. Mai 2004 12:39 schrieb dan...@vi...:
> I have a file with 3 columns - x,y,z. How can I specify the  color/style
****

=2D-=20
=2D----------------------------------------------------------

                               |
                                \
                 /\_/\           |
                | ~x~ |/-----\   /
                 \   /-       \_/
  ^^__   _        /  _  ____   /
 <=B0=B0__ \- \_/     |  |/    |  |
  ||  ||         _| _|    _| _|

if you really want to see the pictures above - use some font
with constant spacing like courier! :-)
=2D----------------------------------------------------------

[Gnuplot-info] help gnuplot

[<dan...@vi...>]

I have a file with 3 columns - x,y,z. How can I specify the  color/style
of the point at x,y based on the value of z?
  
                                              Thanks,Daniele

P

[Gnuplot-info] Compiling v4.0 : problem with PDF

[SWlab <sw...@co...>]

Hi all,
I try to compile gnuplot 4.0 on a SuSE8.2 box (ix86), and I run in a problem 
with the 'pdf' option:
I just compiled the "PDFlib-Lite-5.0.3" library from pdflib.com, that 
installation went without problems (standard location, ie /usr/local/lib)
The configure of gnuplot goes without troubles, it seems to find pdf-config...
...
checking for pdflib-config... /usr/local/bin/pdflib-config
checking for PDF_get_majorversion in -lpdf... yes
checking pdflib.h usability... yes
checking pdflib.h presence... yes
checking for pdflib.h... yes
checking for PDF_begin_pattern in -lpdf... yes
...

When I run make, the program stalls there:
Making all in tutorial
make[2]: Entering directory `/home/src/gnuplot-4.0.0/tutorial'
../src/gnuplot: error while loading shared libraries: libpdf.so.2: cannot open 
shared object file: No such file or directory
make[2]: *** [eg1.tex] Error 127
make[2]: Leaving directory `/home/src/gnuplot-4.0.0/tutorial'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/src/gnuplot-4.0.0/'
make: *** [all] Error 2

I'm a bit confused as there are 5 libpdf files in /usr/local/lib:
libpdf.a,libpdf.la,libpdf.so,libpdf.so.2,libpdf.so.2.2.1
libpdf.so.2 seems to be a link to libpdf.so.2.2.1

Any ideas/hints more than welcome
Thanks in advance



-- 
Soil & Water Laboratory
Dept. of Biological & Environmental Engineering
Cornell University
ITHACA, NY 14853
Tel: (607)255.2463

Re: [Gnuplot-info] autoscale

[<Die...@t-...>]

Dear Kenneth,
I am not 100% sure, but maybe "graph" is your friend.
Try:

set label "A" at graph -0.05,-0.05

this should position your label in relative coordinates (i. e. xmax=3D1.0,=
=20
xmin=3D0, ymax=3D1.0, ymin=3D0) to your graph, even for small(!!!) values o=
f x and=20
y.

Hope this helps,
take care



Dieter

Am Montag, 12. April 2004 23:43 schrieb Manning, Kenneth A. CONT (526B00D):
> Are you still supporting Gnuplot?  If so, I have a question.  I'm trying =
to
> autoscale some data which works pretty well.  The problem is that I have
****

=2D-=20
=2D----------------------------------------------------------

                               |
                                \
                 /\_/\           |
                | ~x~ |/-----\   /
                 \   /-       \_/
  ^^__   _        /  _  ____   /
 <=B0=B0__ \- \_/     |  |/    |  |
  ||  ||         _| _|    _| _|

if you really want to see the pictures above - use some font
with constant spacing like courier! :-)
=2D----------------------------------------------------------

Re: [Gnuplot-info] plot with error bars

[<Die...@t-...>]

Dear Nathan,
please take a look into "help plot errorbars". There you find (gnuplot 4.0):
"... The y error bar is a vertical line plotted from (x, ylow) to (x,
 yhigh). If ydelta is specified instead of ylow and yhigh, ylow =3D y -
 ydelta and yhigh =3D y + ydelta are derived. If there are only two ..."

"... is a vertical line ...". Maybe you can modify the attributes of "line"=
 =20
by saying:
set style line <something>

see set style line. The command does not accept additional parameters like =
the=20
second "with <something>" you used AFAIK.

Hope this helps,
take care

Dieter

Am Mittwoch, 5. Mai 2004 00:43 schrieb Nathan Moore:
> Sorry to post such a stupid question.
>
> Want to plot a set of data in file.dat,
***

=2D-=20
=2D----------------------------------------------------------

                               |
                                \
                 /\_/\           |
                | ~x~ |/-----\   /
                 \   /-       \_/
  ^^__   _        /  _  ____   /
 <=B0=B0__ \- \_/     |  |/    |  |
  ||  ||         _| _|    _| _|

if you really want to see the pictures above - use some font
with constant spacing like courier! :-)
=2D----------------------------------------------------------