gnuplot-info — For questions and discussion about gnuplot

Re: [Gnuplot-info] Reg: Plot/splot function

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

Jhansi Rani Vennam wrote:
> 	can i specify color for a point in the data file?

	set view map
	splot .. with points palette

Re: [Gnuplot-info] drawing color lines

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

Andreas Bott wrote:
> can you tell me how i can plot two curves in a single plot, the first
>  one being a solid blue curve, the second one being dashed blue curve
> 
> 
> or: is it possible to have different colors of solid lines in a
> single plot.
> 
> or: is it possible to change the color of a given linetype.

All three answers depend on you choice of terminal driver, and the
version of gnuplot you're using --- both of which you forgot to tell.

PostScript with some post-editing (automated, or manual) can do 
literally anything you may conceivably want, and then some.  Windows 
supports all of the above, X11 most of them.

Re: [Gnuplot-info] Reg: C Interface

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

Jhansi wrote:
> version :) ). But the only thing is i need to make the mouse to be
> set explicitly for the C interface, where as we need not do that
> explicitly when we call gnuplot at bash.

That's done on purpose --- it usually makes little to no sense at all to
have two asynchronous command channels to the same gnuplot session open
at the same time, which is what allowing mousing during non-interactive
operation would be doing.

[Gnuplot-info] Reg: Plot/splot function

[Jhansi R. V. <jh...@st...>]

Hi all,

	can i specify color for a point in the data file?. Please check 
the following data

	1 2 1
	2 3 1 
	3 4 1
	4 5 2
	5 6 2
	6 7 2

I want the first 3 points to be plotted in one color, and then the next 3
points to be plotted with another color. I know replot will help. But is
there any other way to give this data in one file and asking to plot?.


Thanks,
Jhansi.

[Gnuplot-info] Re: drawing color lines

[K.Moriyama <km...@mb...>]

Hi, 

you can do change of the colors for EPS output through 
a filter like this. (on Unix)
you can change the line definition as you like so 
you can have dashed and solid lines with same color, or whatever.

my example is, 
1) have a script "gpepscolor" like this. (I used Perl)
--------8<----------------8<----------------8<--------
#!/usr/bin/perl
while (<>) {
    if (/^\/LT1/) {
        print "/LT1 { PL [4 dl 2 dl] 0.13 0.39 0.13 DL } def";
    } elsif (/^\/LT4/) {
        print "/LT4 { PL [5 dl 2 dl 1 dl 2 dl] 0 0.8 0.8 DL } def";
    } elsif (/^\/LT5/) {
        print "/LT5 { PL [4 dl 3 dl 1 dl 3 dl] 0.6 0.3 0.2 DL } def";
    } else {
        print;
    }
}
--------8<----------------8<----------------8<--------
in this script i wanted to change the colors of a few lines which 
were not easy to see on screen (presentation), such as green, cyan and 
yellow.
lines in the EPS file defining line types (beginning with /LT#/) 
are replaced by ones with my own line definition.

2) then, do this in gnuplot

set term postscript eps color
set output "| gpepscolor > out.eps"   # writing a file through a filter
plot sin(x) lt 1, cos(x) lt 2

then the output is filtered by the script above and
the output file "out.eps" has altered colors of lines.

this filtering is available for any terminals that outputs text file.
i use the same way for tgif terminal, and also to get a "grayscale" EPS.

mori

Re: [Gnuplot-info] drawing color lines

[<Mik...@vo...>]

Hello Andreas=2C =


I faced the same problem over a year ago and found a solution=2E I wanted=
 to have all curves in a graph identical in black and white and color ver=
sions=2E The aim was to have identical graphs in a textbook=2C which is i=
ssued in both a black and white edition for students and a more expensive=
 color edition=2E I was also able to get the same color for curves=2C fig=
ure and table captions=2C and headings in the book=2C but that is another=
 story=2E

My solution is to edit the created eps file instead of forcing gnuplot to=
 create the colored lines the way you want=2E I am no expert in the Posts=
cript language but after a look in a Postscript manual and some experimen=
ts with the eps file I found a quite simple solution=2E  =


I did it in the following way using gnuplot ver=2E 3=2E7 and OS/2 operati=
ng system=2E

Step 1=2E Create the black and white graph in an eps file

Step 2=2E Open the eps file with a text editor=2E The first lines will lo=
ok something like this

=25!PS-Adobe-2=2E0 EPSF-2=2E0
=25=25Title=3A c=3A/text/komp2/gp/bhkweta=2Eeps
=25=25Creator=3A gnuplot 3=2E7 patchlevel 0
=25=25CreationDate=3A Fri May 16 22=3A13=3A28 2003
=25=25DocumentFonts=3A (atend)
=25=25BoundingBox=3A 50 45 310 302
=25=25Orientation=3A Portrait
=25=25EndComments
/gnudict 256 dict def
gnudict begin
/Color false def
/Solid false def
/gnulinewidth 5=2E000 def
=2E
=2E
=2E

Change /Color false def to /Color true def
Then go down some lines until you find the definitions of the frames and =
lines in the graph=2E

In my original black and white graph file it looks like this =


/LTb =7B BL =5B=5D 0 0 0 DL =7D def
/LTa =7B AL =5B1 dl 2 dl=5D 0 setdash 0 0 0 setrgbcolor =7D def
/LT0 =7B PL =5B=5D 1 0 0 DL =7D def
/LT1 =7B PL =5B4 dl 2 dl=5D 0 1 0 DL =7D def
/LT2 =7B PL =5B2 dl 3 dl=5D 0 0 1 DL =7D def
/LT3 =7B PL =5B1 dl 1=2E5 dl=5D 1 0 1 DL =7D def
/LT4 =7B PL =5B5 dl 2 dl 1 dl 2 dl=5D 0 1 1 DL =7D def
=2E
=2E
=2E
=2E

I found that /LT0=2C /LT1 etc are the line types and by changing the rgb =
code you can easily change the colors of the lines and keep the the lines=
 solid=2C dashed etc=2E In this case the changes were

/LTb =7B BL =5B=5D 0 0 0 DL =7D def
/LTa =7B AL =5B1 dl 2 dl=5D 0 setdash 0 0 0 setrgbcolor =7D def
/LT0 =7B PL =5B=5D 0=2E133 0=2E268 0=2E618 DL =7D def
/LT1 =7B PL =5B4 dl 2 dl=5D 0=2E133 0=2E268 0=2E618 DL =7D def
/LT2 =7B PL =5B2 dl 3 dl=5D 0=2E133 0=2E268 0=2E618 DL =7D def
/LT3 =7B PL =5B1 dl 1=2E5 dl=5D 1 0 1 DL =7D def
/LT4 =7B PL =5B5 dl 2 dl 1 dl 2 dl=5D 0 1 1 DL =7D def
=2E
=2E
=2E

which gives solid and dashed lines with the same blue color=2E Finally sa=
ve the edited eps file=2E =


/Mikael

----------------------------------------------------
Mikael N=E4slund=2C Univ=2Elektor/Ass=2Eprof=2E
V=E4rme och Kraftteknik/Heat =26 Power Engineering
Lunds Tekniska H=F6gskola/Lund Institute of Technology (Lund University)
P=2EO=2E Box 118
SE-221 00 Lund=2C Sweden =

Phone=3A + (0)46 222 92 74
Fax=3A + (0)46 222 47 17
Mobile phone=3A + (0)70 794 08 95 =


----- Original Message -----
From=3A Andreas Bott =3Ca=2Ebott=40uni-bonn=2Ede=3E
Date=3A Tuesday=2C March 8=2C 2005 4=3A29 pm
Subject=3A =5BGnuplot-info=5D drawing color lines

=3E dear colleagues=2C
=3E =

=3E can you tell me how i can plot two curves in a single plot=2C the =

=3E first =

=3E one being a solid blue curve=2C the second one being dashed blue curv=
e
=3E =

=3E or=3A is it possible to have different colors of solid lines in a =

=3E single plot=2E
=3E =

=3E or=3A is it possible to change the color of a given linetype=2E
=3E =

=3E thanks for your help=2E
=3E =

=3E best regards=2C
=3E =

=3E andreas
=3E =

=3E =

=3E -------------------------------------------------------
=3E SF email is sponsored by - The IT Product Guide
=3E Read honest =26 candid reviews on hundreds of IT Products from real =

=3E users=2EDiscover which products truly live up to the hype=2E Start =

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=3E =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
=3E Gnuplot-info mailing list
=3E Gnuplot-info=40lists=2Esourceforge=2Enet
=3E https=3A//lists=2Esourceforge=2Enet/lists/listinfo/gnuplot-info
=3E 

Re: [Gnuplot-info] drawing color lines

[I W. W. <wa...@ya...>]

--- Andreas Bott <a....@un...> wrote:

> can you tell me how i can plot two curves in a
> single plot, the first one being a solid blue curve,
> the second one being dashed blue curve

As I remember no.

> or: is it possible to have different colors of solid
> lines in a single plot.

it is possible, but depend on the terminal you will
use. For example, I prefer postscript terminal. You
can try the following script:

set term postscript solid enhanced solid 'Times' 14
set output 'example.ps'
plot 'data.csv' using 2:3 title 'legend 1' with \
     lines 1, \
     'data.csv' using 1:4 title 'legend 2' with lines
2

You can see the postscript line on my website (sorry
Indonesian).

http://www.pandu.org/CCC/ps_symbols.html

> or: is it possible to change the color of a given
> linetype.

yes.

Wayan

I Wayan Warmada/Dr.
Department of Geology, Faculty of Engineering
Gadjah Mada University, Jl. Grafika 2 - Bulaksumur
Yogyakarta 55281 INDONESIA, Phone: +62-274-901380,513668
E-mail: wa...@ya..., URL: http://warmada.pandu.org
--------------------------------------------------------


	
		
__________________________________ 
Celebrate Yahoo!'s 10th Birthday! 
Yahoo! Netrospective: 100 Moments of the Web 
http://birthday.yahoo.com/netrospective/

[Gnuplot-info] drawing color lines

[Andreas B. <a....@un...>]

dear colleagues,

can you tell me how i can plot two curves in a single plot, the first 
one being a solid blue curve, the second one being dashed blue curve

or: is it possible to have different colors of solid lines in a single plot.

or: is it possible to change the color of a given linetype.

thanks for your help.

best regards,

andreas

[Gnuplot-info] when the plot is finished ?

[Kuang-Chun C. <kc...@gm...>]

Hi,

When I use "plot 'datafile'" command under gnuplot,
the "plot 'datafile'" will return ... (the prompt will showup and
allow me to issue other command) even the plot is not
show up on screen.

Is it possible to use block mode ... so the prompt will show
up only after the plot is finished on screen.  Thanks.

Regards,
KC

Re: [Gnuplot-info] (no subject)

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

> I downloaded GnuPlot version 3.7.1 (old version) from
> http://sourceforge.net/project/showfiles.php?group_id=2055, but I'm
> unable to locate wgnuplot.exe file.

Why wouldn't you use version 4 ? It is far better than 3.7.1, and as easy to 
use.
http://prdownloads.sourceforge.net/gnuplot/gp400win32.zip?download

You'll find the binary in the bin directory.


-- 
Soil & Water Laboratory
Dept. of Biological & Environmental Engineering
Cornell University
Riley-Robb Hall
ITHACA, NY 14853

[Gnuplot-info] (no subject)

[See, H. J <h....@im...>]

Dear Sir,
=20
I downloaded GnuPlot version 3.7.1 (old version) from
http://sourceforge.net/project/showfiles.php?group_id=3D2055, but I'm
unable to locate wgnuplot.exe file.
=20
I am not familiar with the newer versions.  I have used the old version
before on Windows 95, but now I have upgraded my operating system to
Windows XP and wish to run it on the independent GnuPlot console instead
of on Visual Studio.
=20
I look forward to your advise.
=20
Kind regards
=20
Hwee See
Centre for Transport Studies
Imperial College
South Kensington

London                                  =20
SW7 2AZ
=20
Tel:      +44 (0)207 594 5952
Fax:     +44 (0)207 594 6102
Mobile: +44 (0)788 781 8618
E-mail: hs...@im... <mailto:hs...@im...>=20
=20
=20
=20
=20

Re: [Gnuplot-info] Reg: C Interface

[Jhansi <jh...@st...>]

Hi,

	Thanks for a fast reply. I am using the C interface developed by
"N. Devillard". It is using the latest version only(checked it with show
version :) ). But the only thing is i need to make the mouse to be set
explicitly for the C interface, where as we need not do that explicitly
when we call gnuplot at bash.

Thanks,
Jhansi.


On Mon, 7 Mar 2005, Hans-Bernhard Broeker wrote:

> Jhansi wrote:
> > Hi,
> > 
> > 	I updated recently gnuplot with the latest version(4.0). When i am
> > calling gnuplot at bash it is working with 4.0 version( i am able to
> > change the view point of the 3-d plot). But when i am using the 'C
> > interface' 
> 
> Which "C interface", exactly?
> 
>  > i am getting an older version ( i am unable to use my mouse to
> > rotate the plot). 
> 
> That conclusion may well be premature.  Absence of mouse interaction can 
> be caused by commands, or by the sheer fact that you're driving gnuplot 
> indirectly.  Please try to extract the actual version of gnuplot (use 
> 'show version') to make sure what you got.
> 

Re: [Gnuplot-info] Reg: C Interface

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

Jhansi wrote:
> Hi,
> 
> 	I updated recently gnuplot with the latest version(4.0). When i am
> calling gnuplot at bash it is working with 4.0 version( i am able to
> change the view point of the 3-d plot). But when i am using the 'C
> interface' 

Which "C interface", exactly?

 > i am getting an older version ( i am unable to use my mouse to
> rotate the plot). 

That conclusion may well be premature.  Absence of mouse interaction can 
be caused by commands, or by the sheer fact that you're driving gnuplot 
indirectly.  Please try to extract the actual version of gnuplot (use 
'show version') to make sure what you got.

[Gnuplot-info] Reg: C Interface

[Jhansi <jh...@st...>]

Hi,

	I updated recently gnuplot with the latest version(4.0). When i am
calling gnuplot at bash it is working with 4.0 version( i am able to
change the view point of the 3-d plot). But when i am using the 'C
interface' i am getting an older version ( i am unable to use my mouse to 
rotate the plot). Anyidea why it is behaving like this?. 

	Thanks alot!!.

Regards, 
-Jhansi.

Re: [Gnuplot-info] unreadable slopes rendered by gnuplot...

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

Eric Hudson wrote:
> I have a data file (see example below) with a float (tab) date time=20
> columns. I=92m trying to figure out how to plot this data so the points=
=20
> are more readable.=20

There's no way of doing that, with the data you have.  That dataset has=20
more points in your file than a plot can readably show, and there's=20
nothing gnuplot can do about that.  There is just no useful way to plot=20
one datapoint per second over an interval of one hour or more --- a=20
screen simply doesn't have 3600+ pixels next to each other.

So you'll have to downsample your dataset, considerably, or live
with getting a plot like the one you got.  In the examples, there are=20
some x intervals devoid of any data, so yes, you could split the x axis=20
at those points and thus gain a little usable resolution.  But quite=20
certainly not enough to avoid the basic problem.

gnuplot can help with the downsampling, in principle --- but I'm afraid=20
not if the x is a time/date axis.  For others, you could

	plot 'data' u (int($1/factor)*factor):2 smooth uniq w l

to get a display built by averaging all points in each interval of=20
<factor> seconds.

Re: [Gnuplot-info] making 3-D plots

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

iw...@co... wrote:

> I am new to Gnu and wish to convert 3 channels of analog data to a 
> form that Gnu recognizes.  How do I do this? - use an A/D converter 
> and then what?

Impossible to say. It depends on what A/D converter you have, how it's
controlled and read out, and lots of other things --- none of which have
much to do with gnuplot.

Generally speaking, creating datafiles for gnuplot should be about two
orders of magnitude easier than creating Excel files from scratch.  See 
"help splot data" and "help glossary".

Re: [Gnuplot-info] color the line with parameters

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

xz...@ma... wrote:
> Dear All:
>     How can I color the lines with parameters (such as datasets in file)?
> Thanks

See the 'palette' option to splot, and 'help pm3d' for the context this
comes from.

Re: [Gnuplot-info] Re: changing colors

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

K.Moriyama wrote:

>> p x 
 >> rep 2*x

A side note:

	p x, 2*x

would have been faster, and more direct, to get the final plot.

>> The first color is red, the second green. Is it possible to change
>> these colors to e.g. red and blue?

> You can do it by using "set style line".

'set style line' would be an unnecessary detour for this simple task.

	p x lt 1, 2*x lt 3

would have worked just as well (on those terminals where lintetype three
is blue, that is...).

[Gnuplot-info] color the line with parameters

[<xz...@ma...>]

Dear All:
    How can I color the lines with parameters (such as datasets in file)?
Thanks
Xu

[Gnuplot-info] Re: Question

[K.Moriyama <km...@mb...>]

seems like you are doing on ms-windows.
the data file should be in your current directory, i think, 
not the same directory as gnuplot binary.
or, try telling the full path name of the data file, like

gnuplot> plot "c:\the\directory\file.dat" us 1:2

anyway you need to tell your OS and the exact situation and
command you wrote to get the error.

mori

"Brian Sloboda" <gr...@st...> wrote
on Tue, 1 Mar 2005 11:14:25 -0500
Subj.: [Gnuplot-info] Question
> Hello: 
> 
>  
> 
> I have a datafile that I wish to plot.  When I write the syntax, I get a
> message that the file is as follows: 
> 
>  
> 
> Util C:  No such file or directory. 
> 
>  
> 
> I placed the file in the same directory as GNU Plot.  Also the original file
> is a txt file but rename it as a .dat file. 
> 
>  
> 
> Thanks Brian
> 

[Gnuplot-info] Re: changing colors

[K.Moriyama <km...@mb...>]

You can do it by using "set style line".

set style line 1 lt 1 
set style line 2 lt 3
plo x ls 1, 2*x ls 2

k.moriyama

Koller Katja <kat...@si...> wrote
on Wed, 2 Mar 2005 16:42:03 +0100
Subj.: [Gnuplot-info] changing colors
> Hi,
> I have a simple gnuplot with 2 Lines
>  
> p x
> rep 2*x
>  
> The first color is red, the second green. Is it possible to change these colors to e.g. red and blue?
>  
> Thanks for an answer,
> Katja

[Gnuplot-info] making 3-D plots

[<iw...@co...>]

Using Ver. 4.0 with Win XP -

I am new to Gnu and wish to convert 3 channels of analog data to a form that Gnu recognizes.  How do I do this? - use an A/D converter and then what? -  Win Excel?
Any help would be appreciated.

Ira Wexler

Re: [Gnuplot-info] scientific notation

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

> If you could tell us what the difference between what
> you quoted as "computer notation" and "standard scientific notation" is,
> maybe somebody might be able to answer you with more certainty than
> I'm going to.

Like, 10^{-3} vs 1e-3...
If the plot is for scientific publication, I guess a postscript terminal  
would work nicely (or maybe a PNG). Don't try a snapshot of your Xwindow, 
that'd be ugly

> The only possible answer is: read "help format" for yourself and see if
> anything you see there matches what those journals want. 

Just like HB said: check the help on a PS terminal.

As an example, the line
set ylabel 'TDP [{/Symbol m}g.l^{-1}]' 0.5,0 font "TimesBold, 18"
gives nice results on an enhanced postscript terminal

-- 
Soil & Water Laboratory
Dept. of Biological & Environmental Engineering
Cornell University
Riley-Robb Hall
ITHACA, NY 14853

Re: [Gnuplot-info] scientific notation

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

dcwherbert wrote:

> unfortunately find that most journals do not allow computer notation 
> (1e3 or 10**2 ) but insist on standard scientific notation. 

If you could tell us what the difference between what
you quoted as "computer notation" and "standard scientific notation" is,
maybe somebody might be able to answer you with more certainty than
I'm going to.

The only possible answer is: read "help format" for yourself and see if 
anything you see there matches what those journals want.  And make sure 
you understand the difference in capabilities between various gnuplot 
terminal drivers.

[Gnuplot-info] Problems plotting from data file...

[Eric H. <eh...@mi...>]

Hello all,

 

I have a data file in the format:

 

18.327  2005-01-29        18:12:15

22.642  2005-01-29        18:12:14

33.551  2005-01-29        18:12:13

20.103  2005-01-29        18:12:12

23.298  2005-01-29        18:12:11

24.456  2005-01-29        18:12:10

21.519  2005-01-29        18:12:09

24.372  2005-01-29        18:12:08

28.488  2005-01-29        18:12:07

42.732  2005-01-29        18:12:06

50.049  2005-01-29        18:12:05

51.193  2005-01-29        18:12:04

53.216  2005-01-29        18:12:03

57.945  2005-01-29        18:12:02

64.788  2005-01-29        18:12:01

63.525  2005-01-29        18:12:00

 

As you can see my data file consist of datetime fields and the current time
is pushed on top of my data file. My question is how do I tell gnuplot to
plot the file as it is? Currently gnuplot plots the file in ascending order
and I need it to be plotted in descending order (which is the format of my
datafile). Also keep in mind that I'm using timefmt for HH:MM:SS as my X
axis and the decimal numbers for the Y axis. And I can't set the X range
like plot ["18:00":"12:00"] because the contents of my data file change.

 

Any help would be greatly appreciated.

 

Thanks,

 

Eric Hudson