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MathGroup Archive 2007

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Re: Locator in Manipulate's graphic.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg82202] Re: [mg82142] Locator in Manipulate's graphic.
  • From: DrMajorBob <drmajorbob at bigfoot.com>
  • Date: Sun, 14 Oct 2007 06:20:10 -0400 (EDT)
  • References: <12019005.1192263838491.JavaMail.root@m35>
  • Reply-to: drmajorbob at bigfoot.com

> Manipulate[
> Line[{{0, 0}, p}], PlotRange -> 2], {{p, {1, 1}},
> (Locator[#,Appearance->Graphics[Circle[#,2]])&}]

That has a lot of unmatched brackets, which in general makes it rather  
hard to unravel what your problem might be.

I had already noticed, though, that locators have no options or syntax, to  
speak of, when used as Manipulator variables. In help it says {u,  
Locator}, and that's apparently IT, despite the live link from "Locator"  
to the more feature-rich Locator used elsewhere. I can find no examples  
where Locator is used the way you want to use it. (Unfortunately.)

Bobby

On Sat, 13 Oct 2007 02:50:22 -0500, W. Craig Carter <ccarter at mit.edu>  
wrote:

>
> Can anyone see a way to change the Locator's appearance in
> Manipulate.
>
> i.e., from the documentation:
>
> Manipulate[
>   Graphics[Line[{{0, 0}, p}], PlotRange -> 2], {{p, {1, 1}},
> Locator}]
>
> I've tried the "obvious generalization":
>
> Manipulate[
> Line[{{0, 0}, p}], PlotRange -> 2], {{p, {1, 1}},
> (Locator[#,Appearance->Graphics[Circle[#,2]])&}]
>
> without success. Any ideas?
>
>
> W. Craig Carter
>
>
>



-- 
DrMajorBob at bigfoot.com


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