Desktop Survival Guide
by Graham Williams

Box and Whisker Plot: With Means

The simple box plot is extended to include the mean of each column. The means are calculated using scipy, and plotted as a + (pch=3).

rows <- 100
cols <- 17
  dataset <- matrix(rnorm(rows*cols), nrow=rows, ncol=cols)
  means <- mean(
  boxplot(, notch=TRUE, at=1:17,
          xlim=c(0, cols+1), ylim=c(-4,4), xaxt='n')
  axis(side=1, at=1:17, labels=letters[1:17])
  points(1:17, means, pch=3)

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