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? >

**References**:**Question about Manipulate***From:*"mailcwc@gmail.com" <mailcwc@gmail.com>