Plotting multiple columns with a for loop in gnuplot, key doesn't work

Question

I have file with many columns that I'd like to plot as follows:

plot for [i=1:30] 'test' using 1:i w lp

This gives the plot I want, but when I do set key, then the key I see has all lines labeled as 1:i:

enter image description here

How can I make this output more meaningful, by actually displayin the value of i?

Christoph · Accepted Answer · 2015-06-03 20:28:46Z

3

If you don't set an explicit title, gnuplot selects an automatic title based on the plain plot command call. If you want a meaningful title, you must give it explicitly, like

plot for [i=1:30] 'test' using 1:i w lp title sprintf("column %d", i)

answered Jun 3, 2015 at 20:28

Christoph

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