R: Arithmetic Mean

mean {base}

R Documentation

Arithmetic Mean

Description

Generic function for the (trimmed) arithmetic mean.

Usage

mean(x, ...)
mean.default(x, trim = 0, na.rm = FALSE)

Arguments

x

a numeric vector containing the values whose mean is to be computed. A complex vector is allowed for trim=0, only.

trim

the fraction (0 to 0.5) of observations to be trimmed from each end of x before the mean is computed.

na.rm

a logical value indicating whether NA values should be stripped before the computation proceeds.

Value

If trim is zero (the default), the arithmetic mean of the values in x is computed.

If trim is non-zero, a symmetrically trimmed mean is computed with a fraction of trim observations deleted from each end before the mean is computed.

Examples

x <- c(0:10, 50)
xm <- mean(x)
c(xm, mean(x, trim = .10))

all.equal(mean(x, trim = 0.5), median(x))