Midx {DescTools} R Documentation

## Find the Midpoints of a Numeric Vector

### Description

Calculate the midpoints of a sequence of numbers. This is e.g. useful for labelling stacked barplots.

### Usage

Midx(x, incl.zero = FALSE, cumulate = FALSE)


### Arguments

 x the numeric vector incl.zero should zero be appended to x before proceeding? If TRUE the first value will be one half of the first value of x. Default is FALSE. cumulate should the result be calculated as cumulative sum? Default is FALSE.

### Value

numeric vector with the calculated midpoins

### Author(s)

Andri Signorell <andri@signorell.net>

MoveAvg

### Examples

x <- c(1, 3, 6, 7)

Midx(x)
Midx(x, incl.zero = TRUE)
Midx(x, incl.zero = TRUE, cumulate = TRUE)

# an alternative to
head(MoveAvg(c(0, x), order = 2, align = "l"), n = -1)

tab <- matrix(c(401,216,221,254,259,169), nrow=2, byrow=TRUE)
b <- barplot(tab, beside = FALSE, horiz=TRUE)

x <- t(apply(tab, 2, Midx, incl.zero=TRUE, cumulate=TRUE))
text(tab, x=x, y=b, col="red")


[Package DescTools version 0.99.51 Index]