Scatterplot matrices are a great way to roughly determine if you have a linear correlation between multiple variables.

For a set of data variables (dimensions) X1, X2, … , Xk, the scatter plot matrix shows all the pairwise scatter plots of the variables on a single view with multiple scatterplots in a matrix format.

This is a custom scatterplot matrix made using the car package. See other examples of scatter plot matrix in graph #97 and graph #98


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The example does not work:

my_colors <- brewer.pal(nlevels(as.factor(data$cyl)), "Set2")
Error in data$cyl : object of type 'closure' is not subsettable