# cumsum

##### Cumulative Sums, Products, and Extremes

Returns a vector whose elements are the cumulative sums, products, minima or maxima of the elements of the argument.

- Keywords
- arith

##### Usage

```
cumsum(x)
cumprod(x)
cummax(x)
cummin(x)
```

##### Arguments

- x
a numeric or complex (not

`cummin`

or`cummax`

) object, or an object that can be coerced to one of these.

##### Details

These are generic functions: methods can be defined for them
individually or via the `Math`

group generic.

##### Value

A vector of the same length and type as `x`

(after coercion),
except that `cumprod`

returns a numeric vector for integer input
(for consistency with `*`

). Names are preserved.

An `NA`

value in `x`

causes the corresponding and following
elements of the return value to be `NA`

, as does integer overflow
in `cumsum`

(with a warning).

##### S4 methods

`cumsum`

and `cumprod`

are S4 generic functions:
methods can be defined for them individually or via the
`Math`

group generic.
`cummax`

and `cummin`

are individually S4 generic functions.

##### References

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

only.)

##### Examples

`library(base)`

```
# NOT RUN {
cumsum(1:10)
cumprod(1:10)
cummin(c(3:1, 2:0, 4:2))
cummax(c(3:1, 2:0, 4:2))
# }
```

*Documentation reproduced from package base, version 3.5.2, License: Part of R 3.5.2*