[pstricks] More statistical distributions for pst-func

[halbard7 at aol.com]

Dear Herbert,

I have taken the liberty of attaching code, based on \psGauss, for graphing the following distributions:

?Gamma distribution
?Chi-square distribution*
?Student's t distribution*
?Snedecor's F distribution*

*These should be familiar to anyone who has studied Statistics A2 level.

If you do incorporate these into pst-func, feel free to rename the functions and/or parameters as you think best.

Yours

Gerry Coombes

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