Two-sided Bars
The bidirectional bar chart is used to compare two sets of data; each set of data is placed on either side of a vertical axis.
Double-sided bar charts display horizontal bars aligned on a central vertical axis. This type of chart is usually used to compare the values of two variables. An example might be the number of male and female births on the horizontal axis over a number of years on the vertical axis.
The double-sided bar chart combines the compact representation of a bar chart with the horizontal arrangement of the double-sided bar chart.
