Custom boxplots

Produce custom box-and-whisker plot(s) of the given (grouped) values.

boxplot2(
  x,
  ...,
  probs = c(0.05, 0.25, 0.5, 0.75, 0.95),
  vc_cex = c(5, 18, 1.4),
  colors = c("grey75", "grey75", "grey20"),
  med_pch = 3,
  add = FALSE,
  at = NULL
)

Arguments

x	a formula, a an object to be coerced as a data frame.
...	further arguments to be passed to stats::aggregate().
probs	a numeric vector of 5 probabilities used to drawn the boxes. By default probs=c(.05, 0.25, .5, .75, .95).
vc_cex	numeric vector of 3 magnifications coefficients. The first one determines the width of the whiskers, the second one is for the width of the box and the last one is for the symbol indicating the median.
colors	numeric vector of 3 colors for 1- the whiskers 2- the boxes and 3- the symbols that indicates the median.
med_pch	pch value used to indicate the median.
add	a logical. Should the boxes be added on the current graph?
at	numeric vector giving the locations where the boxplots should be drawn, particularly when ‘add = TRUE’; defaults to ‘1:n’ where ‘n’ is the number of boxes.

Value

Draw a boxplot and returns the coordinates as an invisible output.

Author

Kevin Cazelles

Examples

boxplot2(replicate(10, runif(100)))
dfa <- data.frame(name = rep(LETTERS[1:4], 25), val = runif(100))
plot0(c(0,5), c(0,1))
boxplot2(val ~ name, data = dfa, add = TRUE, vc_cex = c(4, 40, 2))