octave complains about gnuplot not being installed

[petersk]

I get this error when trying the example at:

octave:1> x = -2:0.1:2;
octave:2> [xx,yy] = meshgrid(x,x);
octave:3> z = sin(xx.^2-yy.^2);
octave:4> mesh(x,x,z);


http://math.jacobs-university.de/oliver/teaching/iub/resources/octave/octave-intro/octave-intro.html

error: you must have gnuplot installed to display graphics; if you have gnuplot installed in a non-standard location, see the 'gnuplot_binary' function


I've done an apt-get remove -purge gnuplot octave followed
by a subsequent install and still get the same message. Any thoughts? I'm using Jaunty.


For some reason the reinstall with octave was not installing gnuplot

I tried apt-get install gnuplot and it went through and THOUGHT it was there, but when I did a which gnuplot it didn't show up.

I then went through and apt-cache search | grep gnuplot

and systematically install gnuplot-X11 and python-gnuplot.

I then did a aptitude reinstall gnuplot and things work ...
Weird.