gnuplot Cookbook

Using two different y-axes

Sometimes our curves can or should not share the same y-axis. Gnuplot handles this with its tics commands, which we cover in greater detail in Chapter 4, Controlling your Tics. The following figure is a plot of two functions covering very different ranges; if the two curves were plotted against the same y-axis, one would be too small to see:

How to do it…

The following simple three-line script will create the previous figure:

set y2tics -100, 10
set ytics nomirror
plot sin(1/x) axis x1y1,100*cos(x) axis x1y2

Tip

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