A correlation matrix uses two or more variables to describe something. One variable is a correlation of the other. The above matrix describes an unknown area. It shows how certain items, such as different types of pollution and temperature affect each other. It is used to describe mathematical information about a place. A correlation matrix can also be used to describe distances. One city location compared to another affects the distance between each other. A lot of atlases have correlation matrices of mileages showing different cities.
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