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Re: Better Way of Testing and Replacing List Elements?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg103988] Re: Better Way of Testing and Replacing List Elements?
  • From: Raffy <raffy at mac.com>
  • Date: Wed, 14 Oct 2009 07:58:38 -0400 (EDT)
  • References: <hb3fus$lsk$1@smc.vnet.net>

On Oct 13, 8:18 pm, careysub <carey... at gmail.com> wrote:
> 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.

Clip[xxx, {0, Infinity}]  (where Infinity could also be a known
maximum of xxx or Max[xxx])


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