Re: A Functional Programming Question
- To: mathgroup at smc.vnet.net
- Subject: [mg24707] Re: A Functional Programming Question
- From: "Rasmus Debitsch" <debitsch at Zeiss.de>
- Date: Wed, 9 Aug 2000 02:31:07 -0400 (EDT)
- References: <8mdm9v$5o7@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hello,
I haven't find a way to avoid MapThread. But with MapThread :
eqns = {a x + d y == 3a, b y == 0, c z == 0, e x == b e y == a z}
MapThread[Equal @@ Simplify /@ ((List @@ #1)/#2) &, {eqns, {a, b, c, e}}]
will work.
Regards
--
Rasmus Debitsch
Carl Zeiss Lithos GmbH
Carl Zeiss Strasse
D-73447 Oberkochen
eMail : debitsch at zeiss.de
David Park <djmp at earthlink.net> schrieb in im Newsbeitrag:
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/
>
>
>