Defining your own functions
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University of Hawaii at Manoa College of Engineering |
In Gnuplot, you can define your own functions. Functions are defined using
C programming-style definitions, with the same operators and C math library,
functions, with the exception of the **, operator, which is the
exponentiation.
For your reference, a list of built-in functions
and operators are provided here.
Here is an example of the definition of a sinc function. (The sinc function is
defined as the sine of pi times x divided by pi times x, and is used typically
in communications applications.)
sinc(x) = sin(pi * x) / (pi * x)The value pi is a predefined value.