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put some elements to zero

  • To: mathgroup at
  • Subject: [mg101438] put some elements to zero
  • From: Luigi B <L.Balzano at>
  • Date: Tue, 7 Jul 2009 07:46:54 -0400 (EDT)

Dear All,
 I have a matrix with only two columns and many rows. For instance
For those xi<x0, I would like to set yi=0.
I can only think of a very inefficient loop...


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