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Re: How to get Tooltip value

  • To: mathgroup at smc.vnet.net
  • Subject: [mg112893] Re: How to get Tooltip value
  • From: Albert Retey <awnl at gmx-topmail.de>
  • Date: Tue, 5 Oct 2010 05:33:47 -0400 (EDT)
  • References: <i8c8rl$g73$1@smc.vnet.net>

Am 04.10.2010 12:04, schrieb James Brown:
> Is there  a way to extract the value of a variable and display it with 
> Tooltip?
> Example:
> f[x_] := 1/x^2
> Plot[Tooltip[f[x],"Value of x is:" "(wish I knew)"],{x,0,100}]
> 
I think this should get you going:

Dynamic[CurrentValue[{"MousePosition", "Graphics"}]]

I found it works better to only extract the first value and calculate
the function value with that, otherwise the difference can become
irritating:

Plot[Tooltip[f[x],
  Dynamic[{#, f[#]} &@CurrentValue[{"MousePosition", "Graphics"}][[1]]
   ]], {x, 0, 100}]

hth,

albert



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