MathGroup Archive 2007

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Replace certain variable


On Apr 6, 2:44 am, "KFUPM" <hussain.alqaht... at gmail.com> wrote:
> Dear Group
>
> If i have a term like : F[w]*Exp[I*w*t] where F[w] is an arbitrary
> function, and i want to replace w by x+ s*a only in the exponent not
> in F[w], i wonder what is the quickest and easiest way to do it
> provided that i have so many similar terms.
>
> Your help and prompt reply is highly appreciated.
>
> HMQ

There are many ways. The simplest is probably a delayed rule:
expr = F[w] Exp[I w t];
expr /. Exp[arg_] :> Exp[arg /. w -> x s + a]

Gives
E^(I*t*(a + s*x))*F[w]

/Janus



  • Prev by Date: numerical inversion of laplace transform
  • Next by Date: Re: Replace certain variable
  • Previous by thread: Re: Replace certain variable
  • Next by thread: Re: Replace certain variable