[pstricks] adding noise to a signal II

[jmpapy]

in order to implify the problem, I can generate a random sequence with 
an external program and put it in a file noise.dat. In this case I still 
do not know how to add the data generated with pstricks i.e s(n) and the 
random sequence contained in noise.dat i.e. b(n)

JM



Quoting jmpapy <Jean-Michel.Papy at esat.kuleuven.ac.be>:

> 
> Dear pstricks users,
> 
> does anybody knows how to generate a realization of a normally 
> distributed random variable b(n) and to add it to an existing 
> discrete-time signal s(n) drawn using pstricks ?
> 
> For instance s(n) can be drawn as follows:
> \documentclass[a4paper,10pt]{article}
> \usepackage{pst-all}
> \usepackage{pstricks,pstricks-add}
> \begin{document}
> \begin{pspicture}(-5,-0.2)(5,5)
> \psline{-}(-5,0)(5,0)
> \psplot[linecolor=red,plotpoints=50,showpoints=true,linestyle=none]%
> {-1}{3}{4.7 39.48 x 1 neg add 2 exp mul 1 2 exp add div}
> \end{pspicture}
> \end{document} 
> 
> I would want to display s(n)+b(n) with b(n) white and Gaussian
> noise.
> 
> thank you in advance
> 
> JM
> 
> Ps: I got some strange error messages when sending this e-mail, so I
> 
> apologize if you recieve multiple copies of this message
> 
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