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MATLAB for Machine Learning by Giuseppe Ciaburro

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Scatter plots

Relationships between quantitative variables can be highlighted through a suitable graphical representation, named a scatter plot. A scatter plot helps us to study the relationship between two quantitative variables (correlation), detected on the same units. Let us consider a Cartesian reference where the values of a variable appear on the horizontal axis and those of the other variable on the vertical axis. Each point in the plot is specified by a pair of numerical coordinates that represent values of the two variables detected at a specific observation.

A large number of points can be observed in a single dispersion diagram. More such points are placed around a straight line, the greater the correlation between the two variables. ...

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