give_Qn: Place Sample Size on Boxplots at Specified Quartile

In JenC36/JACtools: A Set of Relatively Useful Functions

Place Sample Size on Boxplots at Specified Quartile

Description

This function returns the length (number of observations, n) of a vector and a pre-specified quartile (Q).

Usage

give_Qn(x)

Arguments

x	A numeric vector.
Q	The quartile (y-value) for the label (n). Q must be between 0 and 1.

Details

When used with ggplot, it can to place the number of observations within the box of a box-and-whisker plot into the box at the specified Y-value quartile (Q).
Note that the parameter Q must be specified before using the function.

Examples

color.dat <- c(rep('A', 10),rep('B', 10))
y.dat <- c(rnorm(10,2, 2), rnorm(10,5,5))
example.dat <- data.frame(cbind(color.dat,as.numeric(y.dat)))
Q <- 0.75
(ggplot(example.dat, aes(y=y.dat, x=color.dat, fill=color.dat))
		+ geom_boxplot(color='grey30', aes(fill=color.dat))
		+ stat_summary(fun.data = give.Qn, geom = "text", position = position_dodge(width = 0.75), size = 5, color='red')
		+ scale_fill_manual('', values=c("grey80","grey60"))
		+ theme_bw())

JenC36/JACtools documentation built on Oct. 20, 2024, 8:05 a.m.