This function makes a scatterplot matrix for quantitative variables with density plots on the diagonal and correlation printed in the upper triangle.

ggscatmat(
  data,
  columns = 1:ncol(data),
  color = NULL,
  alpha = 1,
  corMethod = "pearson"
)

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, i.e. no coloring. If supplied, it will be converted to a factor.

alpha

an option to set the transparency in scatterplots for large data. Defaults to 1.

corMethod

method argument supplied to cor

Author

Mengjia Ni, Di Cook

Examples

# small function to display plots only if it's interactive p_ <- GGally::print_if_interactive data(flea) p_(ggscatmat(flea, columns = 2:4))
p_(ggscatmat(flea, columns = 2:4, color = "species"))