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. > > > > > > > > > > > > > > > > > > Thanks, > > Ariel Fligler > > > > >