By default, PROC CHART creates a frequency chart in
which each bar, section, or block in the chart represents a range
of values. By default, PROC CHART selects ranges based on the values
of the chart variable. At the center of each range is a midpoint.
A midpoint does not always correspond to an actual value of the chart
variable. The size of each bar, block, or section represents the number
of observations that fall in that range.
PROC CHART makes several
types of charts:
vertical and horizontal bar charts
display the magnitude
of data with the length or height of bars.
display the relative
magnitude of data with blocks of varying size.