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Re: Epilog in ListLogPlot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg81458] Re: Epilog in ListLogPlot
  • From: Helen Read <hpr at together.net>
  • Date: Sun, 23 Sep 2007 21:21:45 -0400 (EDT)
  • References: <fd58sd$2i1$1@smc.vnet.net>
  • Reply-to: HPR <read at math.uvm.edu>

Bruce Colletti wrote:
> Re 6.0.1 under WinXP.
> 
> Consider the code:
> 
> X = {{2, 4}, {9, 5}, {12, 13}};
> ListPlot[X, Epilog -> {Red, Point@{4, 6}}]
> ListLogPlot[X, Epilog -> {Red, Point@{7, 7}}]
> 
> Helptext says ListLogPlot has ListPlot's options.
> 
> Unlike Plot #1, why doesn't the red dot appear in Plot #2?

I have a similar issue with Epilog working in ParametricPlot, but not 
ParametricPlot3D.

For instance, this works:

Manipulate[
  ParametricPlot[{Cos[t], Sin[t]}, {t, 0, a}, PlotRange -> 1.2,
   Epilog -> {Red, PointSize[Large], Point[{Cos[a], Sin[a]}]},
   PlotLabel -> N[{Cos[a], Sin[a]}, 4]], {a, \[Pi]/48,
   2 \[Pi], \[Pi]/48}]

Yet this does not.

Manipulate[
  ParametricPlot3D[{Cos[t], Sin[t], t/2}, {t, 0, a},
   PlotRange -> {{-1.2, 1.2}, {-1.2, 1.2}, {0, 4 \[Pi]}},
   Epilog -> {Red, PointSize[Large], Point[{Cos[a], Sin[a], a/2}]},
   PlotLabel -> N[{Cos[a], Sin[a], a/2}, 4]], {a, \[Pi]/48,
   8 \[Pi], \[Pi]/48}]



-- 
Helen Read
University of Vermont


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