I have a matrix with real-valued, nonnegative entries. For entry (i,j), I wish to plot a filled circle at the point (i,j) whose color intensity is determined by the magnitude of M(i,j). So for example, if M(2,3) > M(4,8), then a darker dot would appear at (2,3) than at (4,8). I want to draw filled circles as opposed to colored rectangles as one would do using pcolor
EXTRA CREDIT: If the entries of M also change with time, i.e. each entry takes the form M(i,j,t), how could I go about creating an animation that shows the time-course of the various magnitudes. For example, if M(2,3,t) is an increasing function of t, I would want the color intensity of the filled dot at (2,3) to increase.