Plotting multiple lines in a single graph
crawford richard
In message-Id: <334D495F...@obpa.usda.gov>
Sam Barkdull <s...@obpa.usda.gov> wrote:
> I've got Gnuplot for Unix version 3.5, and all I want to do is plot as
> many as six different lines in a single graph using a data file with
> several columns of numbers. I have no problem generating one line with
>
> gnuplot> plot "file.dat" using 12:9 with lines
>
> but how does one produce multiple lines from different columns in a data
> file?
Just string them all together on a single 'plot' command, separated by
commas:
set data style lines
plot "data" u 12:9, "data" u 11:10, "data" u 3:4
gnuplot will automatically assign a different line type (color or dot/
dash pattern) to each line.
Dick Crawford, aka rccra...@lanl.gov
Sam Barkdull
I've got Gnuplot for Unix version 3.5, and all I want to do is plot as
many as six different lines in a single graph using a data file with
several columns of numbers. I have no problem generating one line with
gnuplot> plot "file.dat" using 12:9 with lines
but how does one produce multiple lines from different columns in a data
file?
Excuse my profound ignorance and thanks in advance,
Sam Barkdull
Dave Gavin
try this;
gnuplot> plot "file.dat" using 12:9 with line 1,\
"file.dat" using 12:8 with line 2,\
"file.dat" using 12:7 with line 3,\
"file.dat" using 12:6 with line 4,\
"file.dat" using 12:5 with line 5,\
"file.dat" using 12:4 with line 6
Dave
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Slante,
Dave
dga...@unifi.com
Senior Network Software Engineer
UNIFI Communications
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Khoo Chee
Sam Barkdull wrote:
>
> I've got Gnuplot for Unix version 3.5, and all I want to do is plot as
> many as six different lines in a single graph using a data file with
> several columns of numbers. I have no problem generating one line with
>
> gnuplot> plot "file.dat" using 12:9 with lines
>
> but how does one produce multiple lines from different columns in a data
> file?
>
> Excuse my profound ignorance and thanks in advance,
>
> Sam Barkdull
gnuplot> plot "file1.dat" using 12:9 with lines, "file2.dat" using 12:9
with lines, "file3.dat" using 12:9 with lines, "file4.dat" using 12:9
with lines, "file5.dat" using 12:9 with linese, "file6.dat" using 12:9
with lines
Hope will help you.
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Terrence M. Brannon
Khoo Chee <cwk...@penang1.vz.cit.alcatel.fr> writes:
>
> gnuplot> plot "file1.dat" using 12:9 with lines, "file2.dat" using 12:9
> with lines, "file3.dat" using 12:9 with lines, "file4.dat" using 12:9
> with lines, "file5.dat" using 12:9 with linese, "file6.dat" using 12:9
> with lines
but how to label the columns differently. the title option keeps
giving a syntax error:
gnuplot> plot "file.dat" using 0:1 with line 1 title "x"
undefined variable: title
gnuplot>
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crawford richard
In message-Id: <ysizbu7l...@bufo.usc.edu>
Terrence M. Brannon <bra...@bufo.usc.ed> wrote:
> > gnuplot> plot "file1.dat" using 12:9 with lines, "file2.dat" using 12:9
> > with lines, "file3.dat" using 12:9 with lines, "file4.dat" using 12:9
> > with lines, "file5.dat" using 12:9 with linese, "file6.dat" using 12:9
> > with lines
>
> but how to label the columns differently. the title option keeps
> giving a syntax error:
>
>
> gnuplot> plot "file.dat" using 0:1 with line 1 title "x"
> undefined variable: title
Options are order-dependent -- try
plot "file.dat" using 0:1 title "x" with line 1
Dick Crawford, aka rccra...@lanl.gov
Khoo Chee
How to specify a color if you run out of color after the sixth line
which may use black as default?
Thanks
crawford richard
In message-Id: <3351EF1D...@penang1.vz.cit.alcatel.fr>
Khoo Chee <cwk...@penang1.vz.cit.alcatel.fr> wrote:
[snip]
> How to specify a color if you run out of color after the sixth line
> which may use black as default?
If you put an integer at the end of a section of the 'plot' command
(by a 'section' I mean the options that define a single function or
data set to be plotted), that integer will be used as the 'line-type
index'. A second integer will be used as the 'point-type index'.
Thus
plot f1(x) with lines 3, f2(x) with points 0 5
will plot f1(x) with a line of type 3 and f2(x) with points of type 5.
How do you know which index corresponds to which type? Use the 'test'
command -- it shows a display of the types available to your terminal.
Each terminal has its own menu of types, so if you use several terminals
you should run 'test' for each one.
Note that gnuplot pre-3.6 introduced a slightly different syntax about 20
versions ago -- keywords 'lt' and 'pt' are now required. My example reads
plot f1(x) with lines lt 3, f2(x) with points pt 5
for pre-3.6.
Dick Crawford, aka rccra...@lanl.gov
Khoo Chee
Hi,
In gnuplot pre-3.6 version, it only has eight (I think) colors
to be used to plot multi-lines, and the rest have to use together with
the pattern. Is there a way to alter the source codes to make it to
use as many colors as possible without mixing with patterns? Because
I use it to draw a lot of lines in a graph and it would be very messy
if the patterns are used together.
Thanks & Best Regards,
Khoo.