###--- >>> `barplot' <<<----- Bar Plots

	## alias	 help(barplot)
	## alias	 help(barplot.default)

##___ Examples ___:

tN <- table(Ni <- rpois(100, lambda=5))
r <- barplot(tN, col='gray')
#- type = "h" plotting *is* `bar'plot
lines(r, tN, type='h', col='red', lwd=2)

barplot(tN, space = 1.5, axisnames=FALSE,
        sub = "barplot(...., space= 1.5, axisnames = FALSE)")

data(VADeaths, package = "base")
barplot(VADeaths, plot = FALSE)
barplot(VADeaths, plot = FALSE, beside = TRUE)

mp <- barplot(VADeaths) # default
tot <- apply(VADeaths, 2, sum)
text(mp, tot + 3, format(tot), xpd = NA, col = "blue")
barplot(VADeaths, beside = TRUE,
        col = c("lightblue", "mistyrose", "lightcyan",
                "lavender", "cornsilk"),
        legend = rownames(VADeaths), ylim = c(0, 100))
title(main = "Death Rates in Virginia", font.main = 4)

hh <- t(VADeaths)[, 5:1]
mybarcol <- "gray20"
mp <- barplot(hh, beside = TRUE,
        col = c("lightblue", "mistyrose",
                "lightcyan", "lavender"),
        legend = colnames(VADeaths), ylim= c(0,100),
        main = "Death Rates in Virginia", font.main = 4,
        sub = "Faked upper 2*sigma error bars", col.sub = mybarcol)
segments(mp, hh, mp, hh + 2*sqrt(1000*hh/100), col = mybarcol, lwd = 1.5)
stopifnot(dim(mp) == dim(hh))# corresponding matrices
mtext(side = 1, at = apply(mp, 2, mean), line = -2,
      text = paste("Mean", formatC(apply(hh, 2, mean))), col = "red")

## Keywords: 'hplot'.


