
5 Data Analysis
the first principal component, along the axis of the data. U nlike the coefficient
of determination for 2-D scatters, this measure does distinguish predictor
and response variables.
Scatter Plot Arrays
Use the MATLAB plotmatrix function to make comparisons of the
relationships between multiple pairs of intersections:
figure
plotmatrix(count)
The plot in the (i, j)th position of the array is a scatter with the i th variable
on the vertical axis and the j th variable on the horizontal axis. The plot in
the i th diagonal position is a histogram of the i th variable.
See “Plotting Data” in the MATLAB Data Analysis documentation for more
information on statistical visualization.
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