I have a confusion matrix,But I want to increase its scale along x-axis and y-axis for better reading. for plotting confusion matrix, I am using sklearn confusion matrix. Since the class labels are around 20, so I want to increase the size. These options not working **AS THEY ONLY INCREASE THE SIZE OF THE FIGURE AND NOT THE PLOTTED CONFUSION MATRIX INSIDE IT
fig, ax = pplt.subplots()#pplt.subplot(111)
fig.set_size_inches(25.5, 15, forward=True)