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Re: Can a Locator be Made to Track a Curve?

• To: mathgroup at smc.vnet.net
• Subject: [mg120741] Re: Can a Locator be Made to Track a Curve?
• From: DrMajorBob <btreat1 at austin.rr.com>
• Date: Mon, 8 Aug 2011 04:20:59 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201108060612.CAA13010@smc.vnet.net>
• Reply-to: drmajorbob at yahoo.com

A bit simpler, I think, is:

f[x_] := Sin[x];
g[{x_, _}] := {x, f@x}
pt = {0, 0};
LocatorPane[Dynamic[pt, (pt = g@#) &], Plot[Sin[x], {x, 0, 2 Pi}]]

Bobby

On Sun, 07 Aug 2011 05:14:52 -0500, Heike Gramberg  
<heike.gramberg at gmail.com> wrote:

> You could do something like
>
> f[x_] := Sin[x];
> pt = {0, 0};
> LocatorPane[Dynamic[pt, (pt[[1]] = #[[1]]; pt[[2]] = f[#[[1]]]) &],
> Plot[Sin[x], {x, 0, 2 Pi}]]
>
> Heike
>
> On 6 Aug 2011, at 08:12, Gregory Lypny wrote:
>
>> Hello everyone,
>>
>> Can a locator be constrained so that it tracks a curve?
>>
>> Regards,
>>
>> Gregory
>>
>
>


-- 
DrMajorBob at yahoo.com

• Follow-Ups:
  • Re: Can a Locator be Made to Track a Curve?
    • From: "E. Martin-Serrano" <eMartinSerrano@telefonica.net>

• References:
  • Can a Locator be Made to Track a Curve?
    • From: Gregory Lypny <gregory.lypny@videotron.ca>