Re: No trace of trace!
- To: mathgroup at smc.vnet.net
- Subject: [mg15129] Re: No trace of trace!
- From: "Allan Hayes" <hay at haystack.demon.co.uk>
- Date: Wed, 16 Dec 1998 03:11:08 -0500
- References: <754ulc$je8@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Peter Jay Salzman wrote in message <754ulc$je8 at smc.vnet.net>...
.....
>After looking for close to 5 minutes, I've concluded that the Trace
>*matrix* operation is either not present or well hidden.
>
>Can someone tell me which one?
Peter,
In Mathematica 3.0x you need Tr not Trace
Tr[{{a, b}, {c, d}}]
a + d
Trace is a function that gives the steps in an evaluation (TracePrint is
another one).
Finding functions can be tricky, but you will find Tr in
Help>Help>Built-in Functions>Lists and Matrices>Matrix Operations>Tr
Allan
---------------------
Allan Hayes
Mathematica Training and Consulting
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565