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put some elements to zero

• To: mathgroup at smc.vnet.net
• Subject: [mg101438] put some elements to zero
• From: Luigi B <L.Balzano at gmail.com>
• 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
{xi,yi}.
For those xi<x0, I would like to set yi=0.
I can only think of a very inefficient loop...

thanks
-Luigi-

• Follow-Ups:
  • Re: put some elements to zero
    • From: Adriano Pascoletti <adriano.pascoletti@dimi.uniud.it>
  • Re: put some elements to zero
    • From: Tomas Garza <tgarza10@msn.com>