Re: Can a Locator be Made to Track a Curve?
- To: mathgroup at smc.vnet.net
- Subject: [mg120738] Re: Can a Locator be Made to Track a Curve?
- From: Helen Read <readhpr at gmail.com>
- Date: Mon, 8 Aug 2011 04:20:23 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201108060612.CAA13010@smc.vnet.net> <j1loki$nlf$1@smc.vnet.net>
You might like to add a PlotLabel showing the coordinates.
f[x_] := Sin[x];
pt = {0, 0};
LocatorPane[Dynamic[pt, (pt[[1]] = #[[1]]; pt[[2]] = f[#[[1]]]) &],
Plot[Sin[x], {x, 0, 2 Pi}, PlotLabel -> Dynamic[pt]]]
HPR
P.S. -- Grumpy OT Aside: When did everyone in the world become
top-posters? I'm finding it everywhere...newsgroups, email from family,
friends, co-workers, basically everyone. For years I used to rearrange
it back to traditional bottom-posting when replying to something that
was top-posted, but top-posting has become so prevalent that I have
given up. Did I miss the memo that top-posting is now preferred?
On 8/7/2011 6:15 AM, Heike Gramberg 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
>>
>
>
- References:
- Can a Locator be Made to Track a Curve?
- From: Gregory Lypny <gregory.lypny@videotron.ca>
- Can a Locator be Made to Track a Curve?