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Re: Question about Manipulate

  • To: mathgroup at smc.vnet.net
  • Subject: [mg122777] Re: Question about Manipulate
  • From: David Kahle <david.kahle at gmail.com>
  • Date: Thu, 10 Nov 2011 06:53:15 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <201111091124.GAA11113@smc.vnet.net>

Neither.  In the first you put "f" instead of "f[x]".  Simple mistake, simple fix. :)

Cheers
david.

On Nov 9, 2011, at 5:24 AM, mailcwc at gmail.com wrote:

> I tried the following code in Mathematica 8.0
>
> Clear["Global`*"]
> f = Sin[a x + b]
> Manipulate[Plot[f, {x, 0, 4 \[Pi]}], {a, 0.5, 2}, {b, 0, 2 \[Pi]}]
>
> The Manipulate block is showed, but the Sin function is not plotted.
>
> When I replace f in the third line with its definition,
>
> Clear["Global`*"]
> Manipulate[ Plot[Sin[a x + b], {x, 0, 4 \[Pi]}], {a, 0.5, 2}, {b, 0, 2
> \[Pi]}]
>
> The Sin function is plotted.
>
> Is this a bug or a limitation in Mathematica?
>




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