subscript question
- To: mathgroup at smc.vnet.net
- Subject: [mg71831] subscript question
- From: "dimitris" <dimmechan at yahoo.com>
- Date: Thu, 30 Nov 2006 06:05:39 -0500 (EST)
mat = Table[Subscript[x, i, j], {i, 1, 3}, {j, 1, 3}];
Something like
Apply[Plus, mat, 1]
works fine.
However
Tr[mat]
returns back the command.
Why?
Thanks
Dimitris