random matrix initialisation...
- To: mathgroup at smc.vnet.net
- Subject: [mg37576] random matrix initialisation...
- From: Manuel Marques-Pita <manuxu at mac.com>
- Date: Tue, 5 Nov 2002 05:01:26 -0500 (EST)
- Organization: HCRC or CCS, University of Edinburgh
- Reply-to: m.marques-pita at ed.ac.uk
- Sender: owner-wri-mathgroup at wolfram.com
hello,
i have a question regarding matrices. searched on the web and forums
but maybe due to using wrong keywords i am not finding an answer...
i need a way or function X to initialise matrices in mathematica such
that each time i call X i get a matrix with a predetermined number of
elements initialised as "1" and the rest as "0"
examples
X(4,3)
{{0,0,0,0}, {0,0,1,0}, {0,0,0,1}, {1,0,0,0}}
again X(4,3)
{{1,1,0,0}, {0,0,0,0}, {0,0,0,0}, {0,1,0,0}}
etc.. (first argument means that the matrix is 4x4 and second means
that there should be 3 "1's" present in the matrix
any help, pointers, etc will be appreciated!
thanks a lot
m
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