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Built-in or user-defined functions can be displayed by the plot and splot
commands in addition to, or instead of, data read from a file. The requested
function is evaluated by sampling at regular intervals spanning the independent
axis range[s]. See set samples (p.
) and set isosamples (p.
).
Example:
approx(ang) = ang - ang**3 / (3*2)
plot sin(x) title "sin(x)", approx(x) title "approximation"
To set a default plot style for functions, see set style function (p.
).
For information on built-in functions, see expressions functions (p.
).
For information on defining your own functions, see user-defined (p.
).
2015-06-17