The number of points
in the star is determined in the same way as the number of bars for
vertical bar charts.
If all the data values
are positive, then the center of the star represents zero and the
outside circle represents the maximum value. If any data values are
negative, then the center represents the minimum. See the description
of the AXIS=
value expression
for more information about how to specify maximum and minimum values.
For information about how to specify the proportion of the chart,
see the description of the
LPI=value.
If you try to create
a star chart for a variable with more than 24 levels, then PROC CHART
produces a horizontal bar chart instead.