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Re: Defining function

• To: mathgroup at smc.vnet.net
• Subject: [mg44546] Re: Defining function
• From: "Chia-Ming" <yucalf at mail.educities.edu.tw>
• Date: Fri, 14 Nov 2003 01:58:38 -0500 (EST)
• Organization: DCI HiNet
• References: <bovtvd$nbc$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Dear Ravi,

I guess what the following shows is what you want:
f[t_] := Which[t > 0, E^(-i*t ), t < 0, 0]

You can check that f[1] yields the output E^(-1),
and f[-1] yields output 0.

Good luck!

Chia-Ming Yu


"Ravinder Kumar B." <ravi at crest.ernet.in> ¦b¶l¥ó
news:bovtvd$nbc$1 at smc.vnet.net ¤¤¼¶¼g...
> Dear All,
> How to define a function over two different ranges in mathematica.
> For example
>
> f(t):= Exp[-i*t]  for t > 0   and
>      = 0          for t < 0
>
> Your response/clarification will be deeply appreciated.
> Regards,
> Ravi
>