gnuplot-info — For questions and discussion about gnuplot

Re: [Gnuplot-info] epslatex outputs into different directories sometimes

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

the easiest way to solve the problem:

replace the output filename ('dest') in routine 'term_set_output' in
'term.c' with the fully expanded filename just before opening the file.

there would be two functions for this:

realpath() and canonicalize_file_name()

but

realpath() - it's manpage says one should avoid this function
canonicalize_file_name() - is only existing on systems with glibc

and - both are unable to do tilde-expansion.
this wouldn't be a problem, if they would return NULL in this case, but
realpath() produces a segmentation fault on some systems (e.g. SuSE 10.3).

i think, a remark in the manual that 'cd' shouldn't be used after 'set
output ...' and before 'plot ...' is the best one could do in the moment.

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Re: [Gnuplot-info] Help needed with curve fitting function

[Gopesh P. <gop...@ya...>]

Hello Mr.Br=C3=B6ker,

Thanks for your help. I got what you want to explain about pipe. I used the
pipe  to send commands to gnuplot from Visual Basic (Shell and Sendkeys
functions in VB). =20
But my gnuplot command is a curve fitting function for which initially I
guess parameter values a and b and then gnuplot will do fitting and display
final set of parameters.=20
Now my question is that is there any way by which gnuplot can store, send
back those a and b variables to VB and then I pipe these final values again
to gnuplot. This can give me complete automation.

Thanks,
Gopesh


Gopesh Patel wrote:
>=20
> Hello members,
>=20
> I have a data file containing two columns and I have a fitting function
> like this : f1(x) =3D a1 * sin(x) + b1=20
>=20
> Now I want to multiply my fitting function with 1st value of the 2nd
> column like this:
> f1(x) =3D a1 * [1st value of 2nd column * sin(x)] + b1.=20
>=20
> Is it possible to access the individual values of the column and use them
> like above ? Or can I declare some variable and store individual value in
> and use it in fitting function?
>=20
> Thanks and regards,
> Gopesh
>=20

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[Gnuplot-info] labels and label_contours.awk

[Manfred S. <man...@gm...>]

Hi,

I tried to plot an overlay contour plot over a pm3d map, with labels. I encountered 2 issues:

1) The cited code example at http://gnuplot.sourceforge.net/scripts/index.html#tricks-here
    does not work, it seems outdated.
    "set term table; set out 'contour.dat' " does not work, this should probably be
    "set table 'contour.dat' ; ...; unset table"

2) Issue in the script "label_countours.awk": When doing
gnuplot <<EOF
    set term png truecolor small size 512,320
    set out "demoplot.png"
    set contour base; set cntrparam levels 15; unset surface
    set table "contour.dat"
    splot x*x+y*y
    unset table
    !awk -f label_contours.awk -v nth=10 textcolor=-1 inclt=1 contour.dat >tmp.gp
    reset; load 'tmp.gp'

    set output
EOF

I get
# demo.sh

gnuplot> plot 'contour.dat' index 0 title '200' w l 0,  '' index 1 title '180' w l 1,   '' index 2 title '160' w l 2,       '' index 3 title '140' w l 3,   '' index 4 title '120' w l 4,   '' index 5 title '100' w l 5,       '' index 6 title '80' w l 6,    '' index 7 title '60' w l 7,    '' index 8 title '40' w l 8,        '' index 9 title '20' w l 9
                                                    ^
         "tmp.gp", line 126: ';' expected


The problem seems, "plot ... w l 0" is illegal, I don't know the initial intent, should this be 
"plot ... with lines linetype 0" ?
I then removed the last character from these statement (i.e. "plot ... w l"), and it seemed to work somehow.



After several attempts, I finally made it, but the whole procedure is really a mess.

But besides this: Thanks a lot for this invaluable plotting program!

Regards,
Manfred

Re: [Gnuplot-info] epslatex outputs into different directories sometimes

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

mw-u2 wrote:
> 
> ...
> 
> My point is that this should be changed for usability reasons. In my
> opinion a user changing output via ``set output "foo.tex"'' expects
> foo.tex and foo.eps to be in the same directory. Do you disagree?
> 

no

i was thinking about how it could be done:

a) open the 2nd file for specific terminals when the 1st one is opened (with
'set output ...')
but what if the user specifies the terminal after 'set output'? then the
problem is the same as before.

b) use getcwd, get_current_dir_name, or getwd to determine the full path in
'EPSLATEX_reopen_output()'
in 'pslatex.trm', this would be the best solution.
but are these functions existing on all platforms?
i don't think so (but i'm not sure).
who knows?

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Re: [Gnuplot-info] Need help with plotting 3 functions

[kyle8k <k4k...@wm...>]

Ok great,

Thanks for the help
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Re: [Gnuplot-info] epslatex outputs into different directories sometimes

[<mw...@gm...>]

Thomas Sefzick <t.s...@fz...> wrote:

> i wouldn't call it a bug, it's a feature...

This comment realy made me smile :-)

> it's documented ('help set terminal pslatex': the section about 'auxfile')
> 
> what happens is:
> 'set output "foo.tex"' opens the file 'foo.tex' in the current directory
> and creates a filehandle which is used for writing into it.
> 
> you change the directory ('cd ..')
> 
> 'plot' produces the output file, which is 'subdir/foo.tex', because
> the filehandle was already existing before you changed the directory.
> 
> 'foo.tex' (which in reality is 'subdir/foo.tex') is then closed and the
> output file for writing the eps code is opened using
> 'EPSLATEX_reopen_output()'
> in 'pslatex.trm' simply by cutting off the extension from 'foo.tex',
> so the output file is now 'foo.eps'.
> and it is opened in the actual directory because gnuplot doesn't
> care for directories (why should it?) as long as you don't specify
> one (like in your 2nd example).
> 
> so, 'cd' doesn't have an effect on an already specified output file,
> but it does have an effect an the auxiliary output file which is
> produced after the main output file is written.
> 
> you shouldn't change directories between 'set output' and 'plot'
> commands.

Thank you for your explanations. From a technical point of view now I can understand what's going on.

My point is that this should be changed for usability reasons. In my opinion a user changing output via ``set output "foo.tex"'' expects foo.tex and foo.eps to be in the same directory. Do you disagree?

Of course I have no idea how difficult it is to change that and how many things it breaks.

Yours, Micha

> mw-u2 wrote:
> > 
> > Hi,
> > 
> > when using 
> >   set terminal epslatex
> >   set output "foo.tex"
> >   cd ".."
> >   plot sin(x)
> > 
> > there is a file foo.tex in the subdir and a file foo.eps in the top dir.
> > 
> > On the contrast, when using absolut paths:
> >   set terminal epslatex
> >   set output "~/subdir/foo.tex"
> >   cd ".."
> >   plot sin(x)
> > 
> > both files are inside the subdir.
> > 
> > For me as a user, the first behavior is very irritating. I would call it
> a
> > bug. I think that foo.tex and foo.eps should be in the same directory.
> > cd should not have an effect on an already specified output file.
> > 
> > Thank you,
> > Micha
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[Gnuplot-info] Using histep in log mode

[John A. <Joh...@ma...>]

Dear gnuplot,

I am writing to suggest that for the histep verticals, gnuplot should =20=

use the halfway point calculated *before* taking logs.

I attach a plot of equally spaced data in 100 bins of 10 MeV.  The =20
first bin with content is the bin 10-20 MeV.  The lower vertical =20
should be halfway between 5 and 15 MeV, namely at 10 MeV, but gnuplot =20=

places it at the point halfway between ln(5) and ln(15), namely exp(ln=20=

(5) + (ln(15)-ln(5))/2) =3D 8.66.  Misleading.

As well as the plot I attach data and a file of gnuplot commands.

Regards,

John Allison


John Allison                   Tel: +44-1422-845624
Dept. of Physics & Astronomy   Mobile/Cell: +44-7810-242262
The Univ. of Manchester        Email: Joh...@ma...
MANCHESTER M13 9PL             Email(2): Joh...@3-...
UK                             WWW: http://www.hep.man.ac.uk/u/johna


=EF=BF=BC=EF=BF=BC=EF=BF=BC=EF=BF=BC=EF=BF=BC=EF=BF=BC

Re: [Gnuplot-info] Need help with plotting 3 functions

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

kyle8k wrote:
> I am trying to plot 3 sets of data points from files. The problem is that all
> three have the same xrange, but different yrange. IS there any clean way to
> do this so that all three graphs are on the same set of axis, with seperate
> y scales?

There is a clean way for 2 y axes (see the axes option in "help plot", 
and "help y2tics") , but not for 3.

Re: [Gnuplot-info] Help: problems with gnuplot and ubuntu

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

Davide Deiana wrote:

> I need gnuplot to make graphs, but when i launch the command like "plot 
> x**2" it plot
> the graph in the Terminal using some characters like *, _, and others, 
> simulating the axises and all the other stuffs. The terminal Setted is 
> "dumb"...

That means your build of gnuplot fails to include any GUI drivers (X11, 
wxt).

> i don't know how have the "normal" gnuplot, with the graph that appear 
> in a window form...

You have to compile it with more libaries available.  The "configure" 
prints a lot of informative message --- read them.

Or (probably easier) just install the X11-enabled gnuplot package of 
gnuplot by your Linux distributor.

[Gnuplot-info] Need help with plotting 3 functions

[kyle8k <k4k...@wm...>]

I am trying to plot 3 sets of data points from files. The problem is that all
three have the same xrange, but different yrange. IS there any clean way to
do this so that all three graphs are on the same set of axis, with seperate
y scales?

Thanks in advance

Kyle
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[Gnuplot-info] Help needed with curve fitting function

[Gopesh P. <gop...@ya...>]

Hello members,

I have a data file containing two columns and I have a fitting function like
this : f1(x) = a1 * sin(x) + b1 

Now I want to multiply my fitting function with 1st value of the 2nd column
like this:
f1(x) = a1 * [1st value of 2nd column * sin(x)] + b1. 

Is it possible to access the individual values of the column and use them
like above ? Or can I declare some variable and store individual value in
and use it in fitting function?

Thanks and regards,
Gopesh
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[Gnuplot-info] ouvressa

[Dena D. <Dam...@ma...>]

Make your dragon loooooong and hard as a rock

khalil gavin
http://boxfriend.com/

Re: [Gnuplot-info] Help: problems with gnuplot and ubuntu

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

set terminal wxt
or
set terminal x11

'wxt' should be default in the ubuntu distribution.


Davide Deiana wrote:
> 
> Good morning,
> i'm a student and i have installed ubuntu linux on vmware machine under
> windows XP
> I need gnuplot to make graphs, but when i launch the command like "plot
> x**2" it plot
> the graph in the Terminal using some characters like *, _, and others,
> simulating the axises and all the other stuffs. The terminal Setted is
> "dumb"...
> i don't know how have the "normal" gnuplot, with the graph that appear in
> a
> window form...
> thanks for the attention...
> 
> Regards
> 
> Davide Deiana
> Department of Physics, University of Cagliari, Italy
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2005.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
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> 
> 

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[Gnuplot-info] Help: problems with gnuplot and ubuntu

[Davide D. <dav...@gm...>]

Good morning,
i'm a student and i have installed ubuntu linux on vmware machine under
windows XP
I need gnuplot to make graphs, but when i launch the command like "plot
x**2" it plot
the graph in the Terminal using some characters like *, _, and others,
simulating the axises and all the other stuffs. The terminal Setted is
"dumb"...
i don't know how have the "normal" gnuplot, with the graph that appear in a
window form...
thanks for the attention...

Regards

Davide Deiana
Department of Physics, University of Cagliari, Italy

Re: [Gnuplot-info] epslatex outputs into different directories sometimes

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

Hans-Bernhard Br=C3=B6ker-2 wrote:
>=20
> mw...@gm... wrote:
>> For me as a user, the first behavior is very irritating. I would call it
>> a bug. I think that foo.tex and foo.eps should be in the same directory.
>> cd should not have an effect on an already specified output file.
>=20
> The problem is that "set output" really only _specifies_ the output=20
> file.  It doesn't open it.  And since it's a relative path, the meaning=
=20
> of that specification changes on-the-fly if you change directories.
>=20

sorry, no

'set output' opens the output file:

gnuplot> !ls ts.ps
ls: cannot access ts.ps: No such file or directory
!
gnuplot> set output 'ts.ps'
gnuplot> !ls ts.ps
ts.ps
!

if 'set output' would only specifiy, then micha's problem wouldn't arise.
--=20
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ifferent-directories-sometimes-tf4836648.html#a13852778
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Re: [Gnuplot-info] epslatex outputs into different directories sometimes

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

mw...@gm... wrote:
> For me as a user, the first behavior is very irritating. I would call it a bug. I think that foo.tex and foo.eps should be in the same directory.
> cd should not have an effect on an already specified output file.

The problem is that "set output" really only _specifies_ the output 
file.  It doesn't open it.  And since it's a relative path, the meaning 
of that specification changes on-the-fly if you change directories.

There's not terribly much that could be done about that.

Re: [Gnuplot-info] Printout quality of my diagrams

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

pixel graphics are a bad choice for publications. it's better to use vector
graphics, which are scalable without quality loss, like 'eps', 'svg', 'emf'
- depends on what your word version prefers (emf?)


T. Ghidini wrote:
> 
> Dear you all, 
> 
> I'm a very happy new user of gnuplot, it is working very well and the
> diagrams I' m obtaining are more then satisfactory.
> 
> The only problem I still have is when I want to print out my plots: I
> import the plot in Word as a gif file but the quality I get when I print
> it out is very low. How can I obtain the best resolution and the best file
> format to print it out in windows documents?
> 
> Thanks and kind regards,
> Tommaso
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2005.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
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> 
> 

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[Gnuplot-info] Printout quality of my diagrams

[T. G. <t.g...@ca...>]

Dear you all,=20

I'm a very happy new user of gnuplot, it is working very well and the =
diagrams I' m obtaining are more then satisfactory.

The only problem I still have is when I want to print out my plots: I =
import the plot in Word as a gif file but the quality I get when I print =
it out is very low. How can I obtain the best resolution and the best =
file format to print it out in windows documents?

Thanks and kind regards,
Tommaso

Re: [Gnuplot-info] epslatex outputs into different directories sometimes

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

i wouldn't call it a bug, it's a feature...
it's documented ('help set terminal pslatex': the section about 'auxfile')

what happens is:
'set output "foo.tex"' opens the file 'foo.tex' in the current directory
and creates a filehandle which is used for writing into it.

you change the directory ('cd ..')

'plot' produces the output file, which is 'subdir/foo.tex', because
the filehandle was already existing before you changed the directory.

'foo.tex' (which in reality is 'subdir/foo.tex') is then closed and the
output file for writing the eps code is opened using
'EPSLATEX_reopen_output()'
in 'pslatex.trm' simply by cutting off the extension from 'foo.tex',
so the output file is now 'foo.eps'.
and it is opened in the actual directory because gnuplot doesn't
care for directories (why should it?) as long as you don't specify
one (like in your 2nd example).

so, 'cd' doesn't have an effect on an already specified output file,
but it does have an effect an the auxiliary output file which is
produced after the main output file is written.

you shouldn't change directories between 'set output' and 'plot'
commands.


mw-u2 wrote:
>=20
> Hi,
>=20
> when using=20
>   set terminal epslatex
>   set output "foo.tex"
>   cd ".."
>   plot sin(x)
>=20
> there is a file foo.tex in the subdir and a file foo.eps in the top dir.
>=20
> On the contrast, when using absolut paths:
>   set terminal epslatex
>   set output "~/subdir/foo.tex"
>   cd ".."
>   plot sin(x)
>=20
> both files are inside the subdir.
>=20
> For me as a user, the first behavior is very irritating. I would call it =
a
> bug. I think that foo.tex and foo.eps should be in the same directory.
> cd should not have an effect on an already specified output file.
>=20
> Thank you,
> Micha
> --=20
> Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen!=20
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>=20
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2005.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
> Gnuplot-info mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>=20
>=20

--=20
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ifferent-directories-sometimes-tf4836648.html#a13839359
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[Gnuplot-info] epslatex outputs into different directories sometimes

[<mw...@gm...>]

Hi,

when using 
  set terminal epslatex
  set output "foo.tex"
  cd ".."
  plot sin(x)

there is a file foo.tex in the subdir and a file foo.eps in the top dir.

On the contrast, when using absolut paths:
  set terminal epslatex
  set output "~/subdir/foo.tex"
  cd ".."
  plot sin(x)

both files are inside the subdir.

For me as a user, the first behavior is very irritating. I would call it a bug. I think that foo.tex and foo.eps should be in the same directory.
cd should not have an effect on an already specified output file.

Thank you,
Micha
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Re: [Gnuplot-info] label and coefficient in file

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

depends on what you mean by 'generate a file'

if you are generating the file containing labels and coefficients with
a program, you could generate the whole plot command instead
and let gnuplot execute it as a script file.


Van Landeghem, Bert wrote:
> 
> Dear Gnuplot user,
> I would like to graph a (large) number of curves of the following
> structure:
> 
> coef1*x +coef2*x**2
> 
> I could generate a file with in the first column the label of the graph,
> in the second column the first coefficient and in the third column the
> second coefficient. Is there a way to plot those curves efficiently
> without manually having to enter all coefficients and graph labels into
> a plot command? 
> 
> It would be great if you could give me some directions. 
> 
> Many thanks in advance for your response,
> Bert
> 
> Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
> 
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2005.
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> 
> 

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[Gnuplot-info] =?GB2312?B?0MLG89K1y/m1w8uwt6ihtsq1yqnM9cD9obe94s72MjY3Mw==?=

[Zcqrh <>]

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1r3w

[Gnuplot-info] In re: Hope Collge Alumnus Craig Morford

[Morford W. LLC<web...@Mo...>]

[Gnuplot-info] label and coefficient in file

[Van L. B. <Ber...@ec...>]

Dear Gnuplot user,
I would like to graph a (large) number of curves of the following
structure:

coef1*x +coef2*x**2

I could generate a file with in the first column the label of the graph,
in the second column the first coefficient and in the third column the
second coefficient. Is there a way to plot those curves efficiently
without manually having to enter all coefficients and graph labels into
a plot command?=20

It would be great if you could give me some directions.=20

Many thanks in advance for your response,
Bert

Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

[Gnuplot-info] =?iso-2022-jp?B?jJ+N9YNHg5ODV4OTisiSUJNvmF6DY4Fbg4uBQFNFT4LJjcWTS4FAgaaWoo+zlEaNTI2Q?=

[<se...@am...>]

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=20
**********************************
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