Contour Plot / Plot Range / Contour Scaling

Discussion in 'Mathematica' started by m, Mar 1, 2010.

  1. m

    m Guest

    Hello All,

    I apologize if this has been previously answered, but I have searched
    through the posts for about an hour and have not found an answer to
    this question.

    Here is my scenario:

    I have a family of contour plots and I have a range of values (z) that
    spans the entire family (z from 0 to 1). Some plots will have data in
    the full range and some will have only a subset of the range (say from
    0 to 0.3). My goal is to to have a consistent contour plot coloring
    scheme across all my plots (e.g. 0.5 is yellow on all my plots). It
    seems like this should be accomplished through PlotRange, but that is
    not the case.

    Here is a bit of example code demonstrating my problem (with some
    bogus function)

    (* For Group *)
    ContourPlot[0.3 x y^3, {x, 0, 1}, {y, 0, 1},
    ColorFunction -> "ThermometerColors",
    PlotLabel -> "Temp Dist through slice 1", FrameLabel -> Automatic,
    PlotRange -> {0, 1}, Contours -> 19,
    ContourLabels -> True], {ColorData["ThermometerColors"][1 - #1] &,
    19, "1", "0", LegendPosition -> {0.8, -0.4}}]

    So the max value of the function within the range is 0.3. And the
    PlotLabel shows values ranging from 0 to 0.3 as expected. Yet the
    shaded contours are displaying dark red in the upper right corner,
    which is the value associated with 1. I would expect (and have in vain
    been trying to get Mathemetica to do this) the upper right contour to
    be light blue.

    I am using Mathematica (student edition if that matters)

    Any help would be much appreciated! Thanks!!
    m, Mar 1, 2010
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