Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2005
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2005

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

Search the Archive

Re: restricting range?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57433] Re: [mg57429] restricting range?
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Sat, 28 May 2005 05:38:56 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

f[t_]:=Which[t<1/4, a*t, True, 0];

f[t]

Which[t < 1/4, a*t, True, 0]

Simplify[f[t],t<1/4]

a t


Bob Hanlon

> 
> From: Ken Turkowski <turk at worldserver.com>
To: mathgroup at smc.vnet.net
> Date: 2005/05/27 Fri AM 04:57:59 EDT
> Subject: [mg57433] [mg57429] restricting range?
> 
> I have a function that has multiple branches (using Which), but I would 
> like to restrict its evaluation to one branch for purposes of feeding 
> into Solve.
> 
> I tried
>    f[t] /; t<1/4
> and
>    (t < 1/4) && f[t]
> but neither works. I know I've seen something like this for square roots 
> in the Mathematica book,
>    Sqrt[x^2] restricted to (Im[x] == 0) && (x >= 0)
> but I can't find it. Can you help me?
> 
> 


  • Prev by Date: Re: Sorting nested list
  • Next by Date: Re: Re: Sorting nested list
  • Previous by thread: restricting range?
  • Next by thread: Re: restricting range?