0
$\begingroup$
    data = Table[
   Sin[x] Cos[y] + 0.05 x y, {x, 0, 2 Pi, 0.1}, {y, 0, 2 Pi, 0.1}];
MatrixPlot[data, 
 PlotLegends -> 
  Placed[BarLegend[Automatic, LegendMarkerSize -> 100, 
    LegendLabel -> 
     Placed[Style[Text["(Text for Label)"], Red, FontSize -> 22], 
      Top]], Right], AspectRatio -> 2]   

I really have to questions:

updated

  1. how can I rotate (90 Degree, see fig below) the red LegendLabel to be aligned with BarLegend?
  2. I want to extract the color scheme in the MatrixPlot so I can use it in DensityPlot.

enter image description here

$\endgroup$
  • $\begingroup$ What about putting the legend bar horizontally above the matrix plot, and putting the label horizontally above the bar. To my opinion, it makes more sense esthetically. $\endgroup$ – yarchik Sep 9 at 20:45
  • $\begingroup$ @yarchik, you are right but I have four panels and I want to stack them together and above, and below the plot, I have different labels. $\endgroup$ – HD2006 Sep 9 at 21:28
  • $\begingroup$ Maybe this is relevant? mathematica.stackexchange.com/questions/69952/… $\endgroup$ – yarchik Sep 9 at 21:41
  • $\begingroup$ As to 2nd question: mathematica.stackexchange.com/q/104039/1871 $\endgroup$ – xzczd Sep 9 at 21:42
  • 1
    $\begingroup$ Just replace Right by Top in my answer! $\endgroup$ – OkkesDulgerci Sep 9 at 23:17
2
$\begingroup$
data = Table[
   Sin[x] Cos[y] + 0.05 x y, {x, 0, 2 Pi, 0.1}, {y, 0, 2 Pi, 0.1}];
MatrixPlot[data, AspectRatio -> 2, DataReversed -> True, 
 PlotLegends -> 
  BarLegend[Automatic, LegendMarkerSize -> {25, 250}, 
   LegendLabel -> 
    Placed[Style["(Text for Label)", 22, Red], Top, 
     Rotate[#, 90 Degree] &]]]

enter image description here


You can use this approach.

enter image description here

Double click legend and copy and paste.

im=(*put image of legend here*)


 matrixPlotColor = Module[{colorlist}, colorlist = Join @@ ImageData@im;
   Evaluate[Blend[RGBColor @@@ Reverse[colorlist], #] &]];

DensityPlot[Sin[x] Cos[y] + 0.05 x y, {x, 0, 2 Pi}, {y, 0, 2 Pi}, 
 PlotRange -> All, ColorFunction -> matrixPlotColor, ImageSize -> 220,
  PlotLegends -> Automatic, AspectRatio -> 2, PlotPoints -> 100]

enter image description here

| improve this answer | |
$\endgroup$
  • $\begingroup$ thanks for the answer! $\endgroup$ – HD2006 Sep 9 at 22:21
  • $\begingroup$ in the last fig. with DensityPlot, why the white color is not at zer in the BarLegend? $\endgroup$ – HD2006 Sep 9 at 23:22
  • 1
    $\begingroup$ See my edit. We need to reverse color. It works now. $\endgroup$ – OkkesDulgerci Sep 9 at 23:34

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