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tooltip - evaluate function at point

  • To: mathgroup at
  • Subject: [mg98704] tooltip - evaluate function at point
  • From: "Cristina Ballantine" <cballant at>
  • Date: Thu, 16 Apr 2009 04:18:19 -0400 (EDT)

I would like to plot the solutions to an equation using ContourPlot and 
add a tooltip that evaluates a different function at the points on the 
solution. In particular, for the plot

ContourPlot[Arg[Gamma[x + I*y]] == 0, {x, -10, 10}, {y, -10, 10}, PlotPoints -> 20]

when the cursor is over a solution point I would like the ToolTip to 
display the value of Gamma at that point. Is this possible? If so, any 
suggestion is greatly appreciated. 


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