>Of course, it's over thirty since I did this stuff, but
>it flashed back to me.  Hopefully correctly, but you
>never know!  :-)  As for the matrix calculations, you're
>on your own - I haven't done those since I was 11...

and he I am 5 times as many years later attempting it ...

The maths modelling course I am doing at the moment would suggest that doing
it in a matrix is probably the "best" way.

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist