sum {base} | R Documentation |

## Sum of Vector Elements

### Description

`sum`

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

### Usage

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

### Arguments

`...` |
numeric or complex or logical vectors. |

`na.rm` |
logical. Should missing values be removed? |

### Details

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.

### Value

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.

### References

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]