Tree map

Keith Tan, CFA

A tree map is a graphical representation of data that uses nested rectangles to illustrate the hierarchy of the data. It is often used to display hierarchical data structures, such as file systems or organizational charts, in a more intuitive and visual way.

To create a tree map, the data is organised into a hierarchy, with the highest level representing the root of the tree and the lower levels representing the branches and leaves. Each level in the hierarchy is represented by a rectangle, with the size of the rectangle representing the relative size of the data at that level. The rectangles are often colour-coded to represent different categories or groups within the data.

Tree maps are useful for visualising large data sets and for identifying patterns and trends within the data. They are often used in fields such as finance, marketing, and data visualisation to display and analyse complex data sets.

See also:  Contingency table, Heat map, Confusion matrix

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