Iterators, again

*To*: mathgroup at smc.vnet.net*Subject*: [mg20406] Iterators, again*From*: Eric Spahr <rspahr at worldnet.att.net>*Date*: Tue, 26 Oct 1999 00:32:57 -0400*Sender*: owner-wri-mathgroup at wolfram.com

I am trying to build a matrix: Array[MyArray, {jtop,jtop}] // Array[f, {m,n}] where jtop = some number; m = 1...jtop; n = 1...jtop; itop = some number; and I want to Sum[(something[[m]][[i]])(something[[n]][[i]]), {i, 1, itop}]for it, thus: Array[MyArray = Sum[(something[[m]][[i]])(somethingElse[[n]][[i]]), {i, 1, itop}],{jtop,jtop}]. In other words, I want to iterate through inner n with m = 1, then through outer m with n iterating again. (and, of course, i iterating 1 -> itop each time. This doesn't seem to be able to pick up the part specifications. though it does build the appropriately sized matrix. Nested For[]'s don't seem to work either. Thanks in advance.