Re: A Functional Programming Question

*To*: mathgroup at smc.vnet.net*Subject*: [mg24726] Re: A Functional Programming Question*From*: "Allan Hayes" <hay at haystack.demon.co.uk>*Date*: Wed, 9 Aug 2000 02:31:25 -0400 (EDT)*References*: <8mdm9v$5o7@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

David, eqns = {a x == 0, b y == 0, c z == 0}; Equal @@@ ((List @@@ eqns)/{a, b, c}) {x == 0, y == 0, z == 0} 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 "David Park" <djmp at earthlink.net> wrote in message news:8mdm9v$5o7 at smc.vnet.net... > Dear MathGroup, > > Suppose I have three equations. > > eqns = {a x == 0, b y == 0, c z == 0}; > > I want to divide out the constants a, b, and c. I can do it this way: > > eqns[[1]] = (#1/a & ) /@ eqns[[1]]; > eqns[[2]] = (#1/b & ) /@ eqns[[2]]; > eqns[[3]] = (#1/c & ) /@ eqns[[3]]; > eqns > > {x == 0, y == 0, z == 0} > > Is there a simpler method for doing the calculation in one statement with > functional programming, say using MapThread over eqns and {a,b,c}? Is there > any other simple approach? > > David Park > djmp at earthlink.net > http://home.earthlink.net/~djmp/ > >