Re: Coloring multi-column plot by column number

Eathen

Thanks a lot...that worked perfectly!!!

Debostuti

On Tue, Feb 18, 2020 at 11:34 PM Ethan Merritt <[email protected]> wrote:

> On Monday, 17 February 2020 21:43:16 PST Debostuti Ghoshdastidar wrote:
> > Hi
> >
> > I have a data set (input.dat) which looks as below:
> >
> > #C1     C2    C3 ...   C250
> > 1          -2.1    -1.9...  -1.1
> > 2
> > .
> > .
> > .
> > 10       -0.9    1.3        1.7
> >
> > My intention was that points 1 to 10 will be joined in each column to
> form
> > each plot, and therefore I'll have a 249-line plot. This I am able to
> > achieve by the following:
> >
> > N = system("awk 'NR==1{print NF}' input.dat")
> > plot for [i=2:N] "input.dat" u 1:i with lines title "" linewidth 2
> >
> > Using this I obtain a plot where each line is plotted with a different
> > color. I want the plots to be colored by a defined palette where the
> range
> > is the column number itself, i.e., C2 will be the lightest blue and C250
> > the darkest blue, since the columns are arranged based on a factor.
>
>     set palette defined (0 "white", 1 "dark-blue")
>     set cbrange [2:N]
>     plot for [i=2:N] "input.dat" using 1:i with lines lc palette i
>
> [oops] that should be
>
>     plot for [i=2:N] "input.dat" using 1:i with lines lc palette cb i
>
> The keyword "cb" means to map the palette through the colorbox range.
>
>         Ethan
>
>
>

-- 
Debostuti Ghosh Dastidar
DST SERB National Post-Doctoral Fellow
Molecular Biophysics Unit
Indian Institute of Science, Bangalore

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