[Visualpython-users] Re: compile problem (graphing in python)

[Chris B. <bu...@hv...>]

Hi all.

Just thought I'd mention that the kind of graphing Arnd is looking for
is available through BLT, a widget set for Tcl/Tk.  Luckily, BLT is
available through the Python Mega Widgets (Pmw).  It's a bit of a pain
to setup (need to install BLT, then Pmw) and since BLT is a Tcl/Tk
add-on, it uses it's own vectors (not Numeric arrays).  However, the
interface is rather nice:  you make a vector and tell BLT to graph it.
Then, when you change the vector, BLT automagically updates the graph
widget (line, markers, scaling, etc).  It's by no means as slick as Visual
(e.g., you need to use Tkinter to dress up the widget), but works well for 
some purposes.

See:

Python Mega-Widgets:              http://pmw.sourceforge.net/
BLT in Python (lots of examples): http://heim.ifi.uio.no/~hpl/Pmw.Blt/doc/
The official BLT:                 http://incrtcl.sourceforge.net/blt/

I used it to build an interactive ODE integrator (for watching choatic
systems evolve while they are being integrated).  If you're interested, have
a look:  
http://pathfinder.scar.utoronto.ca/~csca57/RKFgraph.html

Chris

--
Chris Burns
Visiting Assistant Professor
Dept. of physics and astronomy, Swarthmore College
cb...@sw...      http://astro.swarthmore.edu/~burns