Show single legend with approriate color range for a GraphicsGrid

Question

I have a GraphicsGrid of MatrixPlots in the range between 0 and 1 and I want to show a single legend for all of the grid with the appropriate color range.

I tried:

Row[{GraphicsGrid[
   Table[Graphics[
     MatrixPlot[RandomReal[1, {10, 10}], Frame -> False, 
      FrameTicks -> False, ColorFunction -> "TemperatureMap"]], {x, 1,
      10}, {y, 1, 10}]], BarLegend[{"TemperatureMap", {0, 1}}]}]

But the legend's color range does not match those of the graphics. Is there an alternative way to generate a legend?

I found two posts with a similar topic, but I'm not sure how to apply this to my data

• How can I create a legend for a Heat Map when I don't want to show the full range of colors?

• Single Legend for a Table of Plots

Answer 1

Almost there, you problem is, that ColorFunction automaticly rescales. You can change this with ColorFunctionScaling -> False.

So you get:

Row[
 {
  GraphicsGrid[
   Table[Graphics[
     MatrixPlot[RandomReal[1, {10, 10}], Frame -> False, 
      FrameTicks -> False, ColorFunction -> "TemperatureMap", 
      ColorFunctionScaling -> False]], {x, 1, 10}, {y, 1, 10}]
   ],
  BarLegend[{"TemperatureMap", {0, 1}}]
  }
 ]

Which works like intended:

(Well, i would increase the size of the Graphics, but this can easily done by ImageSize-Option) Like so: