>> One of the future improvements I have already planned for Plotdf.tcl is
>> to allow multiple points in the trajectory_at field:
>> ? plotdf([-x,v],[v,x],[trajectory_at,[0,1],[0,2],[0,3]);
>
> That's something I've been looking for, that would be very useful.
There is some code which can plot multiple trajectories using the draw
package at
http://www.telefonica.net/web2/biomates/maxima/gpdraw/prog/index.html
Andrej