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MathGroup Archive 2009

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Better Way of Testing and Replacing List Elements?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg103949] Better Way of Testing and Replacing List Elements?
  • From: careysub <careysub at gmail.com>
  • Date: Tue, 13 Oct 2009 23:19:52 -0400 (EDT)

The code below replaces the negative values in a list with zero, and
is an example of a type of operation I use a lot:

xxx = {1, 2, 3, 4, 5, -6, -7, 8, 9, 10, -1, 11, 12};
ReplacePart[xxx, Position[Map[Negative, xxx], True] -> 0]

Is there a "better" way of doing this (fewer function calls, more
efficient)?

My feeling is that I'm doing this in an awkward way.


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