Heat map

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Heat map is a graphical representation of data in which the individual values contained in a matrix are represented as colors. Heat maps are used to visualize patterns and trends in data sets, and are particularly useful for understanding complex data sets where there are many variables.

To create a heat map, data is plotted on a graph with two axes, with the values on one axis representing the rows and the values on the other axis representing the columns. The data is then represented as colors, with warmer colors (such as red and yellow) indicating higher values and cooler colors (such as blue and green) indicating lower values.

Heat maps are commonly used in fields such as finance, marketing, and biology to visualize patterns and trends in data and to identify areas of interest or concern. They can also be used to identify correlations between variables and to highlight areas of significant difference or change.

See also: Contingency table, Tree map, Confusion matrix