rowCumsums {matrixStats}

Cumulative sums, products, minima and maxima for each row (column) in a matrix

Description

Cumulative sums, products, minima and maxima for each row (column) in a matrix.

Usage

rowCumsums(x, rows = NULL, cols = NULL, dim. = dim(x), ...,
  useNames = TRUE)

colCumsums(x, rows = NULL, cols = NULL, dim. = dim(x), ...,
  useNames = TRUE)

rowCumprods(x, rows = NULL, cols = NULL, dim. = dim(x), ...,
  useNames = TRUE)

colCumprods(x, rows = NULL, cols = NULL, dim. = dim(x), ...,
  useNames = TRUE)

rowCummins(x, rows = NULL, cols = NULL, dim. = dim(x), ...,
  useNames = TRUE)

colCummins(x, rows = NULL, cols = NULL, dim. = dim(x), ...,
  useNames = TRUE)

rowCummaxs(x, rows = NULL, cols = NULL, dim. = dim(x), ...,
  useNames = TRUE)

colCummaxs(x, rows = NULL, cols = NULL, dim. = dim(x), ...,
  useNames = TRUE)

Arguments

x

An NxK matrix or, if dim. is specified, an N * K vector.

rows

A vector indicating subset of rows to operate over. If NULL, no subsetting is done.

cols

A vector indicating subset of columns to operate over. If NULL, no subsetting is done.

dim.

An integer vector of length two specifying the dimension of x, also when not a matrix. Comment: The reason for this argument being named with a period at the end is purely technical (we get a run-time error if we try to name it dim).

...

Not used.

useNames

If TRUE (default), names attributes of the result are set, otherwise not.

Value

Returns a numeric NxK matrix of the same mode as x, except when x is of mode logical, then the return type is integer.

Author(s)

Henrik Bengtsson

See Also

See cumsum(), cumprod(), cummin(), and cummax().

Examples

x <- matrix(1:12, nrow = 4, ncol = 3)
print(x)

yr <- rowCumsums(x)
print(yr)

yc <- colCumsums(x)
print(yc)

yr <- rowCumprods(x)
print(yr)

yc <- colCumprods(x)
print(yc)

yr <- rowCummaxs(x)
print(yr)

yc <- colCummaxs(x)
print(yc)

yr <- rowCummins(x)
print(yr)

yc <- colCummins(x)
print(yc)