How do I make a color legend in gnuplot?

Question

I have a plot which looks like this:

I would like to add a color legend, preferably outside the graph itself. So, for example, a legend with a red dot and, after it, a description of what each red point in the plot means. Similarly for blue.

i.e.

(red dot) 'description'

(blue dot) 'description'

Is there a way to do this in gnuplot?

Yes, remove the parts from your script where you hide the legend (remove unset key or plot ... notitle or plot title '' or their abbreviated forms. — Christoph

psibar psibar · Accepted Answer · 2017-04-01T18:19:07

first, set the key properly:

set key top right outside

Then add title of to the plot command like this:

plot 'data1.txt' title 'description 1', 'data2.txt' title 'description 2'

How do I make a color legend in gnuplot?

1 Answers