Re: mapping of function
- To: mathgroup at smc.vnet.net
- Subject: [mg69949] Re: [mg69914] mapping of function
- From: Adriano Pascoletti <pascolet at dimi.uniud.it>
- Date: Thu, 28 Sep 2006 06:15:01 -0400 (EDT)
- References: <200609271005.GAA00190@smc.vnet.net>
Dimitris,
why not use replacement rules?
In[4]:=
exp1 /. {a:(x | z) :> Sin[a]}
Out[4]=
Sin[x]^3 + (1 + Sin[z])^2
Adriano Pascoletti
On 27 set 2006, at 12:05, dimmechan at yahoo.com wrote:
> Hello.
>
> I am working on John Gray's Book Mastering Mathematica.
>
> Here is one simple expression.
>
> exp1 = x^3 + (1 + z)^2
> x^3 + (1 + z)^2
>
> I am thinking of ways to map the sine function only to {x,z}.
> Here are some alternatives I considered.
>
> MapAt[Sin, exp1, Flatten[(Position[exp1, #1] & ) /@ Variables[exp1],
> 1]]
> Sin[x]^3 + (1 + Sin[z])^2
>
> MapAt[Sin, exp1, Position[exp1, _Symbol, Heads -> False]]
> Sin[x]^3 + (1 + Sin[z])^2
>
> Are there any other possibilities?
>
> Thanks for any response.
>
- References:
- mapping of function
- From: dimmechan@yahoo.com
- mapping of function