base (version 3.2.2)

cumsum: 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.

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.

Details

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

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))