set format x "%P"
or set xtics explicitely
set xtics ("-1" -pi, "-5/6" -5./6.*pi, ... )
> I am super new to gnuplot and I would like to change the x-axis from
> decimal form to increments of a fraction of pi. For example, have a range
> [-pi,pi] and have increments of pi/6, say and show the x-values in exact
> form along the x-axis.
> Is that possible in gnuplot?
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