R: Cumulative Sums, Products, and Extremes

cumsum {base} | R Documentation

## Cumulative Sums, Products, and Extremes

### Description

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

### 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

    cumsum(1:10)
    cumprod(1:10)
    cummin(c(3:1, 2:0, 4:2))
    cummax(c(3:1, 2:0, 4:2))

[Package base version 2.15.1 Index]