Plot2D errors



I am using Maxima 5.13.0 and trying to plot a function using plot2d. Using the 
function "x^2" works fine. However, I tried to plot a normal distribution. I 
got the following error:

(%i1) load(distrib);
(%o1)     /usr/share/maxima/5.13.0/share/contrib/distrib/distrib.mac
(%i2) f(x):=random_normal(0.2,0.1);
(%o2)                   f(x) := random_normal(0.2, 0.1)
(%i3) plot2d([%o2],[x,0,1]);

gnuplot> plot [0.:1.]'/home/schmitz/maxout.gnuplot_pipes' index 0  notitle 
with lines 3
                                                                                      
^
         line 0: warning: Skipping data file with no valid points

gnuplot> plot [0.:1.]'/home/schmitz/maxout.gnuplot_pipes' index 0  notitle 
with lines 3
                                                                                        
^
         line 0: all points y value undefined!

(%o3)

This also happens if I try to plot a piecewise function. Simple functions like 
sin, cos or similar do work well. The maxout.gnuplot* files contain only the 
title of the plot and then thousands of empty lines.

What's going wrong here?

Best regards,

Arne

-- 
Dipl.-Inform. Arne Schmitz              Phone   +49 (0)241 80-21817
Computer Graphics Group                 Fax     +49 (0)241 80-22899
RWTH Aachen University                  http://www.rwth-graphics.de
Ahornstrasse 55, 52074 Aachen, Germany
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part.
Url : http://www.math.utexas.edu/pipermail/maxima/attachments/20071217/408adc94/attachment.pgp