Re: How To Change A Rule
- To: mathgroup at smc.vnet.net
- Subject: [mg32343] Re: [mg32334] How To Change A Rule
- From: Andrzej Kozlowski <andrzej at tuins.ac.jp>
- Date: Wed, 16 Jan 2002 03:29:50 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
You can use rules to manipulate rules. In yur case:
In[11]:=
{s1 -> -11, s2 -> 12} /. (x_ -> (y_)?Negative) -> x -> 0
Out[11]=
{s1 -> 0, s2 -> 12}
Andrzej Kozlowski
Toyama International University
JAPAN
http://platon.c.u-tokyo.ac.jp/andrzej/
On Tuesday, January 15, 2002, at 04:30 PM, Ariel Fligler wrote:
> Greetings,
>
> I'm quite newby to Mathematica programming and will thank you if you
> could
> help me solve the following:
>
> I have a list of rules of the form:
> {s1->-11, s2->12}
> And would like to change every rule in the list that it's RHS is
> negative to
> 0 so that I will get:
> {s1->0, s2->12}
> I tried to find an access function to manipulate rules but could not.
>
> Any help ?
>
> TIA,
>
> Ariel.
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> Thanks,
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> Ariel Fligler
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