Creating and Plotting a Confusion Matrix from a Plain Matrix

Question

Using ClassifierMeasurementsObject you can plot nice ConfusionMatrix:

But how to mimic this matrix plot from a plain Matrix?

In other terms, from

M={{2,0},{1,1}}
k={"A","B"}

I would like to reproduce the previous plot.

So far I tried:

MatrixPlot[M,Frame->True,
             FrameLabel->{"actual","predicted"},
             ColorFunction->"Rainbow"]

but a lot of things are missing.

The most important are:

• numbers in the plot

• tick labels (note that they are rotated which is important as I have long names)

Answer 1

m = {{2, 0}, {1, 1}};
k = {"A", "B"};
MatrixPlot[m, ColorRules -> {0 -> White}, Frame -> True, 
 FrameLabel -> {"actual", "predicted"}, 
 FrameTicks -> {{MapIndexed[{#2[[1]], #} &, k], 
    MapIndexed[{#2[[1]], #} &, Total@Transpose@m]}, 
   {MapIndexed[{#2[[1]], #} &, Total[m]], 
    MapIndexed[{#2[[1]], #} &, k]}}, 
 ColorFunction -> "Rainbow", 
 Epilog -> MapIndexed[Text[Style[#, 16], #2 - 1/2] &, Transpose@Reverse@m, {2}]]