Re: A Functional Programming Question

*To*: mathgroup at smc.vnet.net*Subject*: [mg24741] Re: A Functional Programming Question*From*: "Mark Reeve" <msreeve at earthlink.net>*Date*: Wed, 9 Aug 2000 02:31:46 -0400 (EDT)*References*: <8mdm9v$5o7@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

One way, though not terribly elegant, is the following: In[1]:= eqns~Function[{eq, cf}, Map[#/cf & , eq], {Listable}]~{a, b, c} Out[1]= {x == 0, y == 0, z == 0} -Mark 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/ > >