Mosaic or Mekko Charts
Basic line, bar and pie charts are excellent tools for comparing one or two variables in few categories, but what happens when you need to compare multiple variables or multiple categories at the same time?
What if all those variables aren’t numeric even? A mosaic – or Mekko – chart plot might be the better choice.
Perhaps a market analyst, for example, wants to compare more than the size of various mobile-phone markets. What if, instead, he or she needs to compare the size of the user bases, as well as the age groups within each group?
A mosaic chart would allow said marketer to illustrate all the variables in a clear and straightforward manner.
In the above example, one axis of the chart represents the categories being compared – mobile phone manufacturers – while the other axis lists various age ranges.
The size and color of each cross-section of the chart corresponds with the market segment it represents, as depicted in the chart's legend.
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