median {stats} | R Documentation |
Compute the sample median.
median(x, na.rm = FALSE)
x |
an object for which a method has been defined, or a numeric vector containing the values whose median is to be computed. |
na.rm |
a logical value indicating whether |
This is a generic function for which methods can be written. However,
the default method makes use of is.na
, sort
and
mean
from package base all of which are generic, and so
the default method will work for most classes
(e.g. "Date"
) for which a median is a reasonable
concept.
The default method returns a length-one object of the same type as
x
, except when x
is integer of even length, when the
result will be double.
If there are no values or if na.rm = FALSE
and there are NA
values the result is NA
of the same type as x
(or more
generally the result of x[FALSE][NA]
).
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
quantile
for general quantiles.
median(1:4) # = 2.5 [even number] median(c(1:3, 100, 1000)) # = 3 [odd, robust]