My mistake, it's SpotPlot, and the address is
http://bhs.broo.k12.wv.us/homepage/alumni/dstevick/spotplot/spot.htm I
had a copy of IRT, but deleted it, and I don't know where I got it from.
Ari Friedman
There's light at the end of the Sonotube.
j.royston wrote:
> > Try Interactive Ray Tracer (IRT), or StatPlot.
> Where do I get these from, preferably free!
>
> Best wishes, Jerry