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Extraction of positive values from list of both +/- values

• To: mathgroup at smc.vnet.net
• Subject: [mg34637] Extraction of positive values from list of both +/- values
• From: divinesaam at aol.com (O.A. Linares, M.D., Ph.D.)
• Date: Thu, 30 May 2002 02:55:26 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Dear Colleagues,

I have a list of values:

lstvals={700, 600, 500, 400, 300, 200, 100, -50, 100, -200, -300}

I want to create a list that contains only the positive values. I know I can use 

lst=Take[lstvals, 7]

The problem is, the size of the vectors vary. Help appreciated.

Thanks,

Oscar

• Follow-Ups:
  • Re: Extraction of positive values from list of both +/- values
    • From: jmt <jmt@dxdydz.net>