HEATMAP displays a matrix as an image whose color intensities
reflect the magnitude of its values. In addition, it enables you
to specify the following properties: * X- and Y-axes tick
labels: Display the row/column indices or any other numeric or
text labels. X-axis tick labels can even be rotated. * Text
labels: Overlay the heatmap image with formatted text labels.
The text labels can be derived from the original numeric matrix
or a different matrix or cell array for displaying another
dimension of data. You can control the font size and font color
of the labels. The labels update automatically with zooming,
panning or resizing the figure. * Custom color maps: Use
MATLAB's default color maps or specify your own. The function
provides two additional color maps - "money" (shown in the
example image) and "red" (a color map of red color intensities).
Specify Linear or Logarithmic color maps and the number of color
levels. You can even use different color maps for different heat
maps within a figure. * Other con