[pstricks] inverse standard normal

[Herbert Voss]

Am 23.09.2010 11:59, schrieb Matthias Ruess:
> Hi,
> 
> I need to draw the density function of the Vasicek distribution: This 
> density function has the following structure:
> 
> a * Exp[ (b * norminv(x) + c)^2 + d * norminv(x)^2  ] where a,b,c and d 
> are constants.
> 
> Since there exist an Exp-operator in pstricks, the only thing I need is a 
> norminv operator (an approximation of the inverse of the standard normal 
> distribution). 
> Is there someone who can help me to build this in pstricks?

I'll have a look at it at weekend if not soneone else can do it.

Herbert