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R Data Analysis Cookbook - Second Edition by Kuntal Ganguly

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Creating line graphs

Line graphs are normally used to visualize relationships between two continuous variables along the x axis and y axis; that is, how the continuous variable on the x axis changes its relation with respect to another continuous variable on the y axis. Line graphs can also be used with a discrete variable on the x axis and are appropriate when the variable is ordered as such (small, medium, and large).

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