Dear all,
  I need some help on plotting multiple boxplots on one figure.
  I have three matrix A, B and C. Each of them is a 1000 by 10 matrix.
The 10 columns of all three matrix correspond to the
10 values of the same parameter, say k=1, ..., 10.
  I want to make a plot where x axis represents different values of k.
For each k value, I want to plot three boxplots, one on top of another.
For example, for k=1, I want to draw three boxplot based on the first
column of A, B and C respectively. Similarly, I do the same for the rest of
k values.
  Can some one give me some hint on this?
  Thank you so much.
        Hannah

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