sum {base}R Documentation

Sum of Vector Elements


sum returns the sum of all the values present in its arguments.


sum(..., na.rm = FALSE)


... numeric or complex or logical vectors.
na.rm logical. Should missing values be removed?


This is a generic function: methods can be defined for it directly or via the Summary group generic.

If na.rm is FALSE an NA value in any of the arguments will cause a value of NA to be returned, otherwise NA values are ignored.

Logical true values are regarded as one, false values as zero.


The sum. If all of ... are of type integer or logical, then the sum is integer, and in that case the result will be NA (with a warning) if integer overflow occurs.
NB: the sum of an empty set is (integer) zero, by definition.


Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

[Package base version 2.2.1 Index]