thanks for the encouragement, Alex I don't know how i did it, but J is now on my smartphone as well and it works
Again, it is a bit messy to find and get to, no lovely icon in the program files, but i can find it under applications 'bin' and it works that is a pleasure now I need to learn how to do loops, integrals, sums, products and such thanks dick ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
