Extended Scatterplot Matrices

A matrix of scatterplots is produced.The upper triangular matrices contain nothing else than the correlation coefficient. The diagonal displays a histogram of the variable. The lower triangular matrix displays a scatterplot superposed by a smoother. It's possible to define groups to be differntiated by color and also by individual smoothers. The used code is not much more than the pairs() code and some examples, but condenses it to a practical amount.

PlotPairs(x, g = NULL, col = 1, pch = 19, col.smooth = 1, main = "", 
          upper = FALSE, ...)

Arguments

x: the coordinates of points given as numeric columns of a matrix or data frame. Logical and factor columns are converted to numeric in the same way that data.matrix does. Will directly be passed on to pairs.
g: a group variable
col: color for pointcharacter
pch: point character
col.smooth: color for the smoother(s)
main: the main title
upper: logical, determines if the correlation coefficients should be displayed in the upper triangular matrix (default) or in the lower one.
...: additional arguments passed to pairs function.

Author

Andri Signorell <andri@signorell.net>

Examples

PlotPairs(iris[1:4], g=iris$Species, main = "Anderson's Iris Data -- 3 species",
          col=c(DescTools::hred, DescTools::hblue, DescTools::hgreen), 
          col.smooth=c("black", DescTools::hred, DescTools::hblue, DescTools::hgreen))

Arguments

Author

See also

Examples