gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] How to do such plot? Thanks!

[Jinsong Z. <zh_...@ya...>]

Dear all,

I have a data set with the following format:

1.889730	-0.944860	-5.669180	-0.011924
2.834590	-0.944860	0.000000	0.005855
0.944860	0.000000	2.618500	-0.023102
1.889730	0.000000	5.615540	0.023313
.....
.....

The first three columns is the coordinate of a specific point, and the
fourth colomn is the value of the point.

I hope to plot those points in 3D space with the value presented by
different color, for example, bule for negative value and red for
positive, or from bule to red with gradual change.

I can not find a way to do so. Would you like to give me some
suggestions?

Thank you very much for your kindly help.

Best wishes,

Jinsong

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[Gnuplot-info] VIRUS EN SU CORREO / VIRUS IN YOUR MAIL

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[Gnuplot-info] Can't disable the minor grid

[Jeffrey W. B. <jw...@ac...>]

Greetings.

I can never seem to get the minor grid to turn off.  Is that feature just
broken?  I'm using gnuplot 4.0pl0 and if I try for example

set xtics ("1" 1 0, "" 2 1)
set grid xtics nomxtics
set xrange [-10:10]
plot sin(x)

I get grid lines at the major *and* minor points.  The feature of setting grid
line style separately for major and minor also doesn't seem to work.  For
example set grid lw 50, lw 0 gives width 50 on both major and minor.

Note that the major and minor *tics* are being drawn in their correct respective
sizes.  It's just the gridlines that are messed up.

-jwb

[Gnuplot-info] help

[Bret W. <Bre...@th...>]

help

Re: [Gnuplot-info] $(gnuplot --version) don't work

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

only4 wrote:

> I want to obtain the version string of gnuplot and get is in a shell script
> variable, but I get an error trying the common VERSION=$(gnuplot --version)
> Ps: My goal is write some lines of shell script that uses "filledcurves"
> only if Gnuplot is >=4, "lines" otherwise

Your main problem is that "gnuplot --version" works for version 4, but 
*not* for the version you're trying to test against (anything before 
that, up to and including 3.7.3).  The only backwards-compatible method 
to extract a version number from gnuplot is to run

	echo show version | gnuplot

and parse the resulting multi-line text.

[Gnuplot-info] Re: $(gnuplot --version) don't work

[only4 <onl...@ka...>]

Or it works only in vers >=4 ! In fact, I have a Debian-stable system, with
gnuplot 3.7. gnuplot --version don't work here.
Do you have the chance to compare my error with your debian-stable system,
if you have one?
I hope the newsgroup can help me
--
I use PGP/GPG. Ask for my key if interested.
-

----- Original Message ----- 
From: "Marek W. Gutowski" <gu...@if...>
To: "only4" <onl...@ka...>
Sent: Monday, October 25, 2004 2:49 PM
Subject: Re: [Gnuplot-info] $(gnuplot --version) don't work


> only4 wrote:
> > I want to obtain the version string of gnuplot and get is in a shell
script
> > variable, but I get an error trying the common
VERSION=$(gnuplot --version)
> > Ps: My goal is write some lines of shell script that uses "filledcurves"
> > only if Gnuplot is >=4, "lines" otherwise
> >
> Did you mean something like:
>
> % gnuplot --version
> gnuplot 4.0 patchlevel 0
> %
> ?
>
> It works perfectly in my Debian GNU/Linux installation.
> This is probably due to the standardization of Debian
> Linux packages and may not work under other Linux
> flavors.
> Give (Debian) Linux a chance.
> Marek Gutowski
> -- 
> Marek Gutowski, gu...@if...
> Institute of Physics, ON-3.2, Al. Lotnikow 32/46,
> (PL) 02-668 Warszawa, POLAND, tel. +48-22-8436601 ext. 3122
>  >> To talk or not to talk?  Yes, talk, plain ASCII please <<
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[Gnuplot-info] $(gnuplot --version) don't work

[only4 <onl...@ka...>]

I want to obtain the version string of gnuplot and get is in a shell script
variable, but I get an error trying the common VERSION=$(gnuplot --version)
Ps: My goal is write some lines of shell script that uses "filledcurves"
only if Gnuplot is >=4, "lines" otherwise

[Gnuplot-info] Re: multiplying factor

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

Hi,

When you load in a file you generally have a set of
number - two columns, in particular, for plot. But you
can multiply them by any factor you want...

plot 'data.dat' u 1:($2*2)

...for example, will plot the data in columns 1 and 2,
but will double the value of the data in the second
column.

Not too sure if this is what you wanted to know, but I
hope it helps.

Gavin.   

Subject: [Gnuplot-info] (no subject)
> 
> Can i use short notations for multiplying factors in
> a data file.
> ex. 100 mA= 100 x 0.001 A
> 



		
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Re: [Gnuplot-info] (no subject)

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

bar...@te... wrote:

> Can i use short notations for multiplying factors in a data file.
> ex. 100 mA= 100 x 0.001 A

In a word: no.  You can generate metric abbreviations in axis ticks
(--> 'help set format specifiers'), but gnuplot can't read such data
from a file.  OTOH, I don't see how 100m is any shorter than 0.1 ;-)

Re: [Gnuplot-info] loading an image into a gnuplot

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

Todd Hansen wrote:

> gnuplot>  plot "ROADNet-HPWREN-sensors-wide.rgb"  binary with rgbimage
>                                                         ^
>          2d binary files not yet supported
> 
> I wonder if someone can say what version of gnuplot that feature works in?

It works in the very same version you took that example from.  I.e. the 
CVS work-in-progress version.

[Gnuplot-info] (no subject)

[<bar...@te...>]

Can i use short notations for multiplying factors in a data file.
ex. 100 mA= 100 x 0.001 A

[Gnuplot-info] loading an image into a gnuplot

[Todd H. <tsh...@nl...>]

I would like to load a 2-d raster image into gnuplot so taht I can plot
temperature contours over a simple 3d map that is already available.

http://cvs.sourceforge.net/viewcvs.py/gnuplot/gnuplot/demo/image.dem?rev=1.2

I found a nice bit of code for plotting pre-fab'd images but gnuplot 4.0.0
complains:

gnuplot>  plot "ROADNet-HPWREN-sensors-wide.rgb"  binary with rgbimage
                                                        ^
         2d binary files not yet supported

I wonder if someone can say what version of gnuplot that feature works in?
Thanks in advance.
	-todd

Re: [Gnuplot-info] Contour plot + reference function/contour

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

De la Fuente L=F3pez, Luis Fernando wrote:

> I' m using gnuplot to plot all my functions and data, but I do not know=
 how
> I can make a splot (controlling the countour levels) and also on the ba=
se to
> have a reference contour to compare if the contours are outside the
> reference. The reference is a data collection of points x,y that have t=
o be
> conected.

The base is just a plane of constant z.  The only difficulty is that by=20
default, it's z position is kept outside the actual plot's zrange.  But=20
that can be changed:

	set ticslevel 0

moves the base plane to the bottom of the zrange of your data.  Now,=20
you'll have to know where that bottom is, and fix it, e.g.:

	set zrange [z_bottom:*]

Now you can plot your data and the reference, e.g.

	plot 'datafile' with points, \
	     '' using 1:2:(z_bottom) with lines
	     'reference' using 1:2:(z_bottom) with lines

Re: [Gnuplot-info] command line history

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

Mustafa Uludogan wrote:

> gnuplot works fine except I can not call any old commands on the
> gnuplot command line. When I press the arrow buttons I get OA
> symbol. I use bash shell. What should be done to correct this ?

Turn off "application cursor keys" mode in your terminal emulator, or
use a better terminal emulator.

[Gnuplot-info] Contour plot + reference function/contour

[<Lui...@ca...>]

Hello everybody,
I' m using gnuplot to plot all my functions and data, but I do not know =
how
I can make a splot (controlling the countour levels) and also on the =
base to
have a reference contour to compare if the contours are outside the
reference. The reference is a data collection of points x,y that have =
to be
conected.

Best regards

> LUIS F. DE LA FUENTE LOPEZ
> EADS CASA Espacio=20
> Avda. Arag=F3n 404 - 28022 Madrid, Spain=20
> Phone: (+34) 91 585 7711
> email: Lui...@ca...=20
>=20
>=20
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a ella
vinculadas.La informaci=F3n contenida en este correo es
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como destinatario. Si usted no es el destinatario de este mensaje o si =
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[Gnuplot-info] [gnavi-list] List Posting Error Notification

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[Gnuplot-info] command line history

[Mustafa U. <ulu...@ya...>]

Hi,
I have succesfully installed gnuplot 4.0.0 patchlevel
0  on my linux redhat 8.0 kernel 2.4.20-28.8.
gnuplot works fine except I can not call any old
commands on the gnuplot command line. When I press the
arrow buttons I get OA  symbol. I use bash shell.
What should be done to correct this ?
Yours Sincerely


		
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[Gnuplot-info] Re: Gnuplot-info digest, Vol 1 #131 - 5 msgs

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

Hi Danilo,

I see what you mean. You could always get the same
result in this manner....

set xrange[0:1]
set yrange[0:1] reverse
set y2range[0:1]
plot 0.4 axes x1y2 w filledcurves y2=0.6

and plot whatever you want in the first y axis?
Although someone on here might know how to fix the
filledcurves thing.

Gavin.

> Hi!
> 
> I have a problem with "filledcurves" when using
> "reverse" yranges.
> It doesn't seem to work.
> 
> Example 1)
> 
> gnuplot> set xrange [0:1]; set yrange [0:1]
> gnuplot> plot 0.4 w filledcurves y1=0.6
> 
> Example 2)
> 
> gnuplot> set xrange [0:1]; set yrange [0:1] reverse
> gnuplot> plot 0.4 w filledcurves y1=0.6
> 
> The first example works OK. In the second one the
> "filledcurves"
> style does not seem to work at all.
> 
> What am I doing wrong?
> I need to use reverse yranges in my plots!
> 
> I'm currently using Gnuplot 4.0 under Linux 2.4.22
> (Slackware 9.1.0).
> Thanx in advance.
> Danilo Velis.
> 



		
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Re: [Gnuplot-info] streamline with gnuplot ?

[Mike B. <mba...@uk...>]

St=E9phane,

I'm not sure that I fully understand what you want to do, but assuming that=
=20
you are trying to plot a series of vectors (which represent stream lines?),=
=20
then try someting like the following:

plot 'stream.dat' u 1:2:3:3 w vector

where the file 'stream.dat' contains=20

four columns of data corresponding to the x, y, delta_x and delta_y=20
coordinates of the arrows. I've used this to produce hydrological routing=20
networks (small example attached). It's also possible to drape flow lines,=
=20
such these, over a 3D surface.

Good luck,

Mike

> To obtain streamline with gnuplot, I use the command lines :
>
> set xrange [-1:1]
> set yrange [-1:1]
> set arrow from 0,0 to 0.5,0.5
> plot (0)
> unset arrow
> set xrange [*:*]
> set yrange [*:*]
>
> The problem is that I do not know how to do without the command line
> "plot(0)".
>
> Indeed, without this command, I cannot see the arrow on my x11 terminal.
>
> What is the right way to obtain the arrows on my x11 terminal (i.e.
> without "plot(0)") ?

Re: [Gnuplot-info] streamline with gnuplot ?

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

Dellacherie Stephane wrote:

[...]

> Indeed, without this command, I cannot see the arrow on my x11 terminal.
> 
> What is the right way to obtain the arrows on my x11 terminal (i.e. 
> without "plot(0)") ?

None.  Arrows are meant to be part of a plot, in gnuplot.  That's why 
the command is "set" arrow, not "draw arrow" or whatever --- arrows are 
part of the description of the plot you set up with various gnuplot 
"set" commands, which will then get executed for all subsequent "plot", 
"splot" and "replot" commands.

If you don't need an arrowhead, it may be that

	plot '-' w l
  	  0 0
	  0.5 0.5
	 E

is useful to you.  See "help datafile special" to see how this works.

[Gnuplot-info] streamline with gnuplot ?

[Dellacherie S. <del...@CR...>]

Hello,

To obtain streamline with gnuplot, I use the command lines :

set xrange [-1:1]
set yrange [-1:1]
set arrow from 0,0 to 0.5,0.5
plot (0)
unset arrow
set xrange [*:*]
set yrange [*:*]

The problem is that I do not know how to do without the command line=20
"plot(0)".

Indeed, without this command, I cannot see the arrow on my x11 terminal.

What is the right way to obtain the arrows on my x11 terminal (i.e.=20
without "plot(0)") ?

Thank you for your help.

St=E9phane

[Gnuplot-info] filledcurves + reverse

[Danilo R. V. <ve...@fc...>]

Hi!

I have a problem with "filledcurves" when using "reverse" yranges.
It doesn't seem to work.

Example 1)

gnuplot> set xrange [0:1]; set yrange [0:1]
gnuplot> plot 0.4 w filledcurves y1=0.6

Example 2)

gnuplot> set xrange [0:1]; set yrange [0:1] reverse
gnuplot> plot 0.4 w filledcurves y1=0.6

The first example works OK. In the second one the "filledcurves"
style does not seem to work at all.

What am I doing wrong?
I need to use reverse yranges in my plots!

I'm currently using Gnuplot 4.0 under Linux 2.4.22 (Slackware 9.1.0).
Thanx in advance.
Danilo Velis.

-- 
=======================================================================
   Dr. Danilo R. Velis                      Dept. of Applied Geophysics
   Observatorio Astronomico de La Plata          Tel: +54 221 423-6593
   Paseo del Bosque s/n                          Fax: +54 221 423-6591
   La Plata 1900, Argentina             Email: ve...@fc...
=======================================================================

[Gnuplot-info] Gnuplot 4.0 installer for Mac OS X available

[Per P. <per...@ma...>]

Long overdue, a binary installer package of gnuplot 4.0 for Mac OS X is 
now available from the main download site,
http://sourceforge.net/projects/gnuplot

This binary was built with support for, and requires the presence of, 
AquaTerm and XWindows (X11).
AquaTerm can be freely downloaded from http://aquaterm.sourceforge.net 
and
X11 can be installed from your Mac OS X install CD or downloaded from 
Apple, http://www.apple.com

The download features a standard installer and comes with documentation 
in PDF-format as well as "man" and "info" pages.

/Per

[Gnuplot-info] Re: Gnuplot-info digest, Vol 1 #127 - 1 msg

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

Hi Bret,

Not too sure what you mean. I usually open it as a
pipe so open it just as you would a file, but using
popen (rather than fopen), pflush (rather than fflush)
and pclose (rather than fclose). 

As soon as you pclose then your programme should close
gnuplot. Sounds like you might be doing something to
hang up gnuplot though.......  


> I did something similar from PERL. The hitch is that
> the pipe is buffered.
> You can flush the pipe, but that only flushes the
> pipe's input, not it's
> output. So gnuplot waits forever. My workaround was
> to call gnuplot in a
> mode where it exits when it's done, using a file for
> the data and most of
> the commands, rather than piping everything in. This
> requires a temp file,
> of course, but you can re-use the same one if you
> don't plan on multiple
> users of your app.
> 
> Bret



		
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[Gnuplot-info] gnuplot 3.7

[<pd...@ch...>]

Hello,

One more question,
Using term postscript I can have more colors, however, how can I manage these
colors ? They are different from the x11 term, even if I set them in
.Xdefaults (gnuplot*line6Color: yellow).

-- 
---
==============================================================================
  Patrick DUPRE                 |   |
  Department of Chemistry       |   |  Phone: (614) 292-8406
  Ohio State University         |   |  Fax:  (614) 292-1948
  120 West 18th Avenue          |   |
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