R/panel.R

In cwhmisc: Miscellaneous Functions for Math, Plotting, Printing, Statistics, Strings, and Tools

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", ...)
}
panel.cor <- function(x, y, digits=2, prefix = "", cex.cor) {
    usr <- par("usr"); on.exit(par(usr))
    par(usr = c(0, 1, 0, 1))
    r <- abs(cor(x, y, use = "complete.obs"))
    txt <- format(c(r, 0.123456789), digits = digits)[1]
    txt <- paste(prefix, txt, sep = "")
    if (missing(cex.cor)) cex <- 0.8 / strwidth(txt)
    text(0.5, 0.5, txt, cex = cex * r)
}