Re: How To Change A Rule

*To*: mathgroup at smc.vnet.net*Subject*: [mg32357] Re: How To Change A Rule*From*: "Allan Hayes" <hay at haystack.demon.co.uk>*Date*: Wed, 16 Jan 2002 03:30:11 -0500 (EST)*References*: <a20mon$4hf$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Arial, Us a replacement rule {s1 -> -11, s2 -> 12} /. (x_ -> n_ /; n < 0) -> (x -> 0) {s1 -> 0, s2 -> 12} or {s1 -> -11, s2 -> 12} /. (x_ -> n_) -> (x -> Max[n, 0]) {s1 -> 0, s2 -> 12} -- Allan --------------------- Allan Hayes Mathematica Training and Consulting Leicester UK www.haystack.demon.co.uk hay at haystack.demon.co.uk Voice: +44 (0)116 271 4198 Fax: +44 (0)870 164 0565 "Ariel Fligler" <ariel.fligler at cellpay.biz> wrote in message news:a20mon$4hf$1 at smc.vnet.net... > 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 > > >