Midx: Find the Midpoints of a Numeric Vector

In DescTools: Tools for Descriptive Statistics

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 <[e-mail]>

See Also

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")

DescTools documentation built on Sept. 26, 2024, 1:07 a.m.