discrete plot



I want a discrete plot of a function.
For instance:

declare(n,integer)
a: abs(n)

Now I want a plot of the points a(n),n. for -5 <= n <= 5

How do I perform this in WXMaxima?
I try it with wxplot2d([a], [n,-5,5])$, but I get a continuous plot.
Using discrete plot gives a Lisp- error.


Thamks for your help,

Ike Hylkema
The Netherlands

ic.hylkema at gmail.com