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Re: parasite points with Mesh

  • To: mathgroup at smc.vnet.net
  • Subject: [mg95927] Re: [mg95884] parasite points with Mesh
  • From: "David Park" <djmpark at comcast.net>
  • Date: Fri, 30 Jan 2009 05:42:32 -0500 (EST)
  • References: <28227494.1233226810509.JavaMail.root@m02>

It looks like a bug to me.

You could plot the points separately. In Presentations this would be:

Needs["Presentations`Master`"]

f[x_] := x^3/3 - x;
Draw2D[
 {Draw[f[x], {x, -3, 3}],
  PointSize[Medium],
  Point[{#, f[#]}] & /@ {-1, 1.5, 0, 2}},
 Axes -> True]

Or use Plot with Epilog to plot the points.


David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark/  




From: Jaccard Florian [mailto:Florian.Jaccard at he-arc.ch] 

Hello,

I have a parasite Meshpoint (at about x=2.2) with the following input:


Plot[(1/3)*x^3 - x, {x, -3, 3}, Mesh -> {{-1, 1.5, 0, 2}}, MeshStyle ->
PointSize[Medium]]

As I have often these parasits, I really wonder... Can somebody help and say
how I can delete it?

Regards,

F.Jaccard







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