Re: Manipulate and ParametricPlot Control?
- To: mathgroup at smc.vnet.net
- Subject: [mg114351] Re: Manipulate and ParametricPlot Control?
- From: David Annetts <david.annetts at iinet.net.au>
- Date: Thu, 2 Dec 2010 05:37:12 -0500 (EST)
Hi Anthony,
On 1/12/2010 15:11, AES wrote:
> This is a "what did I do wrong" post? It's related to the
> "re-virginating" thread I started recently, but quite separate (and I
> think genuinely puzzling).
>
> As a simple test file, I created a notebook (which I don't have any
> more) containing the one cell
>
> Manipulate[ Plot[x^a, {x,0,1}], {a,0,5}]
>
> (May have had a PlotRange option also; don't recall for sure.)
>
> Executed it; worked as expected.
>
> Decided to set an initial value for a; as best I recall (details are
> fuzzy), I edited the cell to change {a,0,5} to {{a,1},0,5} (that's what
> I intended to do, anyway).
>
> When I re-executed the cell, I got a live Manipulate that displayed a
> ***two-dimensional*** (2D) Control -- something I had never seen before,
> but which looked exactly like the one I more recently found in the
> ParametricPlot example in the Manipulate Help.
>
> Exercising this Manipulate displayed **two** x^a curves, with values
> corresponding to the H and V axes of the 2D Control. Functioned fine;
> no error msgs at any time.
I can't say for sure what went wrong in your case.
I can say that when I repeat the steps you list above, I get completely
expected results.
D.