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MathGroup Archive 2009

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Plot: Problem with Mesh Option

  • To: mathgroup at smc.vnet.net
  • Subject: [mg102661] Plot: Problem with Mesh Option
  • From: Benjamin Hell <hell at exoneon.de>
  • Date: Tue, 18 Aug 2009 06:06:45 -0400 (EDT)

Hi,
I'm currently stuck on figuring out how to display the full mesh when 
manually defining it via passing a list of points, which looks like this:

timevector = Table[0.1*i, {i, 0, 10}];
Plot[Sin[t], {t, First[timevector], Last[timevector]},
Mesh -> {timevector}, MeshStyle -> Directive[PointSize[Large], Red]]

The whole thing works as expected, but the first and the last point of 
the mesh, which correspond to {0,Sin[0]} and {1,Sin[1]} in the example 
above, don't show up. So how can I fix that?



Here is my further investigation:
- The points of course do show up if I increase the time interval on 
both sides, let's say {t, First[timevector]-0.1, Last[timevector]+0.1} 
but this is not a proper solution to me.

- Workarounds that do work:
      1.Manually inserting the points in the Graphics output via a
      new Graphics object (not that nice):
      Show[
        Plot[Sin[t], {t, First[timevector], Last[timevector]},
       Mesh -> {timevector}, MeshStyle -> Directive[PointSize[Large],
       Red]],
        Graphics[{PointSize[Large], Red,
          Point[{First[timevector], Sin[First[timevector]]}],
          Point[{Last[timevector], Sin[Last[timevector]]}]}]
       ]

      2.Using ParametricPlot instead of Plot (the best solution I
      found):
      ParametricPlot[{t, Sin[t]}, {t, First[timevector],
       Last[timevector]},
       Mesh -> {timevector}, MeshStyle -> Directive[PointSize[Large],
      Red]]

Thanks in advance,
Benjamin


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