       Re: Re: Mouse-Over or Mouse-Click Values of Coordinates

• To: mathgroup at smc.vnet.net
• Subject: [mg103695] Re: [mg103642] Re: Mouse-Over or Mouse-Click Values of Coordinates
• From: Bob Hanlon <hanlonr at cox.net>
• Date: Fri, 2 Oct 2009 08:31:40 -0400 (EDT)

```Manipulate[
b = Round[a, .001];
pt = {b, Round[Sin[b], .001]};
Plot[Sin[x], {x, -Pi, Pi},
Epilog -> {Red,
PointSize[Medium],
Point[pt], Black,
Text[pt, pt,
1.25 Sign[a] {1, 1}]}],
{a, -Pi, Pi, Pi/100,
Appearance -> "Labeled"}]

Bob Hanlon

---- Nasser Abbasi <nma at 12000.org> wrote:

=============

"Gregory Lypny" <gregory.lypny at videotron.ca> wrote in message
news:h9srm3\$p3g\$1 at smc.vnet.net...
> Hello everyone,
>
> Is there a way to include in Manipulate something like a tooltip,
> where the coordinates of a point in a plot appear where the user clicks.
>
> Regards,
>
> Gregory
>

I know how to do it with discrete data. Here is an example

data = Table[Tooltip[Sin[x]], {x, -Pi, Pi, Pi/100.}];
ListPlot[data, Joined -> True]

And now if you move the mouse over the plot, the y-value (i.e. sin(x) )
value will be displayed, here is a screen shot
http://12000.org/tmp/093009/tooltip.PNG

But with the direct plot command, I still can't figure it

Plot[Tooltip[Sin[x]], {x, -Pi, Pi}]

will display "Sin[x]", instead of the current value of it. As shown here:
http://12000.org/tmp/093009/tooltip2.PNG

I tried using Dynamics and Annotation with Mousover to get it to work, but
no luck. I am sure some Mathematica expert here will have an answer on how
to do it with a direct plot command instead of discrete plot.

--Nasser

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