Plots the lowertriangle and density plots of the scatter plot matrix.

Function for making scatterplots in the lower triangle and diagonal density plots.

scatmat(data, columns = 1:ncol(data), color = NULL, alpha = 1)

Arguments

data: a data matrix. Should contain numerical (continuous) data.
columns: an option to choose the column to be used in the raw dataset. Defaults to 1:ncol(data)
color: an option to group the dataset by the factor variable and color them by different colors. Defaults to NULL
alpha: an option to set the transparency in scatterplots for large data. Defaults to 1.

Author

Mengjia Ni, Di Cook

Examples

# small function to display plots only if it's interactive
p_ <- GGally::print_if_interactive

data(flea)

p_(scatmat(flea, columns = 2:4))

p_(scatmat(flea, columns = 2:4, color = "species"))