Learn in the textbookCross-Tabulation and Advanced Visualization of Correlation
DefinitionA combination chart (複合グラフ) overlays different kinds of charts, such as a bar chart and a line chart, in one figure.
ExplanationFor example, showing amounts as bars and ratios or changes over time as a line lets you compare amounts and changes on the same time axis. A moving total is the sum over a fixed period, recalculated as the period shifts forward one step at a time, and its line can be drawn over bars of the original values.
AnalogyLayering land-use colors and railway lines onto one map lets you compare information drawn in different ways on the same base.
Memory hookCombination = putting two or more things together into one.