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