[pstricks] plot a sequence of points

[azzam.hassan at voila.fr]

Hello all pstrickers
How can one plot a sequence of points using a \multido loop in th case where x's or y's are function of the \multido counter. (without using \plotdata nor \psplot if possible)

Here below an example :
\psset{yunit=.5cm}
  \def\yn{\n 2.5 mul .5 add}% example of the ordinate function  
\begin{pspicture*}(-3,-6)(5,6)
  \psaxes{->}(0,0)(-3,-6)(5,6)
  \multido{\n=-3.+1}{6}{
 \psplot[linecolor=red,algebraic=true,plotpoints=400]{-3}{5}{(\n*(1+x*x)+1)/(x)}
 \psdot(2,\yn)% abscissa and ordinates are function pf
 }
 \end{pspicture*}

Cordialement
Azzam HASSAN
tel : 06 63 82 97 09

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