1. The pairs command had an additional function that would put a histogram on its diagonal:
panel.hist <- function(x, ...) {
usr <- par("usr"); on.exit(par(usr))
par(usr = c(usr[1:2], 0, 1.5) )
h <- hist(x, plot = FALSE)
breaks <- h$breaks; nB <- length(breaks)
y <- h$counts; y <- y/max(y)
rect(breaks[-nB], 0, breaks[-1], y, col = "cyan", ...)
}
For each line of the function, explain what it’s doing.
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panel.hist <- function(x, ...) {We are creating a function named as “panel.hist” in first line. The above code is used to create histogram on the diagonals in a scatter plot matrix.
usr <- par("usr"); on.exit(par(usr))
The above function calculates the number of pairs of correlation or scatter plots....
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