[pstricks] pstricks-add documentation

[Dominique RODRIGUEZ]

>  cpiateck at univ-orleans.fr schrieb:
>  > When trying to plot with the algebraic option I find that the
>  > documentation is not enough precise on the algebraic use of functions as
>  > Sum, Ceiling...
>  
>  @Dominique, please provide some examples ...

Here are some examples. Note that all the math functions defined in the PS language
can be used with the natural function call syntax f(x), included add, mul, sub, div,
atan, ran....

Hope this help (especially cyrille),
Dominique
-- 
  Les Galinières - 07460 St André de C. FRANCE-- tel: (+33)475.39.05.82
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