Re: Matrix Expansion question to Mathgroup

*To*: mathgroup at smc.vnet.net*Subject*: [mg47842] Re: Matrix Expansion question to Mathgroup*From*: Harold.Noffke at wpafb.af.mil (Harold Noffke)*Date*: Thu, 29 Apr 2004 00:34:41 -0400 (EDT)*References*: <c6d8m2$ji6$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Larry: Your question is not trivial, because what you have is a rank-3 tensor, and I was not able to get AppendRows and AppendColumns to work for rank-3 tensors A and B in a simple programming example. It is obvious that each of your matrix elements are lists, and the only lists you want affected by AppendRows and AppendColumns are the outermost two -- i.e., in dimensions 1 and 2. MathGroup ... Do we have packages available which extend AppendRows and AppendColumns to tensors? Regards, Harold