Hi all.

I've been fighting with matlab over one problem, my main question is...could I write the first equation listed in this image:

http://i15.photobucket.com/albums/a3...diffeqcrap.jpg

as

x1' = 2x

x2' = -x

x3' = 3x

x4' = -2x

?

I have no problem solving this by hand but Matlab is fighting me tooth and nail. Thanks a lot guys!

-Brady, University of Maryland