Re: Flashing Graphs With Manipulate
- To: mathgroup at smc.vnet.net
- Subject: [mg88696] Re: [mg88672] Flashing Graphs With Manipulate
- From: Christopher Carlson <carlson at wolfram.com>
- Date: Tue, 13 May 2008 07:08:29 -0400 (EDT)
- References: <200805120846.EAA21345@smc.vnet.net>
On May 12, 2008, at 3:46 AM, bobbaillie at frii.com wrote:
> If the coefficient of x is < 0 and the constant term is > 0,
> this graph flashes as you drag the sliders.
>
> Why? NSolve can't be taking that much longer in this case.
>
> What can be done to prevent the flashing?
>
> Manipulate[
> With[ { func = b x + c },
> Module[ { rts },
> rts = NSolve[func == 0, x];
> ListPlot[
> {Re[x], Im[x]} /. rts,
> PlotStyle -> PointSize[0.03],
> PlotRange -> {{-10, 10}, {-10, 10}}, ImageSize -> {300, 300},
> AspectRatio -> 1, PlotLabel -> func]
> ]
> ],
> { {b, -1, "coefficient of x"}, -9, 9, .1, Appearance -> "Labeled"},
> { {c, 3, "constant term"}, -10, 10, .1, Appearance -> "Labeled"}
> ]
This is a bug that was largely fixed in version 6.0.2: in some
instances, objects inside a Manipulate would flash when sliders were
dragged.
A workaround here is to replace
PlotLabel -> func
with
PlotLabel -> ToString[func]
Christopher Carlson
User Interface Group
Wolfram Research, Inc
- References:
- Flashing Graphs With Manipulate
- From: bobbaillie@frii.com
- Flashing Graphs With Manipulate