mean {base} | R Documentation |
Generic function for the (trimmed) arithmetic mean.
mean(x, ...) ## Default S3 method: mean(x, trim = 0, na.rm = FALSE, ...)
x |
An R object. Currently there are methods for
numeric/logical vectors and date,
date-time and time interval objects. Complex vectors
are allowed for |
trim |
the fraction (0 to 0.5) of observations to be
trimmed from each end of |
na.rm |
a logical value indicating whether |
... |
further arguments passed to or from other methods. |
If trim
is zero (the default), the arithmetic mean of the
values in x
is computed, as a numeric or complex vector of
length one. If x
is not logical (coerced to numeric), numeric
(including integer) or complex, NA_real_
is returned, with a warning.
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.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
weighted.mean
, mean.POSIXct
,
colMeans
for row and column means.
x <- c(0:10, 50) xm <- mean(x) c(xm, mean(x, trim = 0.10))