To produce a scatterplot matrix of the component
scores, from the menus choose:
Graphs
Scatter...
Select Matrix.
Click Define.
Select REGR factor score 1 for
analysis 1 through
REGR factor score 3 for
analysis 1 as the matrix variables.
Click OK.
The first plot in the first row shows the first component on the vertical axis versus the
second component on the horizontal axis, and the order of the remaining plots follows from there.
The scatterplot matrix shows that the first component has a skewed distribution,
which is because Price in thousands
is skewed. A principal components extraction using a log-transformed
price might give better results.
The separation that you see in the third component is explained by the
fact that Vehicle type is a
binary variable.
There appears to be a relationship between the first and third
components, due to the fact that there are several expensive
automobiles but no "luxury trucks." This problem may be alleviated
by using a log-transformed price, but if this does not solve the problem,
you may want to split the file on Vehicle type.