colCumsums-xgCMatrix-method: Calculates the cumulative sum for each row (column) of a...

In sparseMatrixStats: Summary Statistics for Rows and Columns of Sparse Matrices

Description

Calculates the cumulative sum for each row (column) of a matrix-like object.

Usage

## S4 method for signature 'xgCMatrix'
colCumsums(x, rows = NULL, cols = NULL)

## S4 method for signature 'xgCMatrix'
rowCumsums(x, rows = NULL, cols = NULL)

Arguments

x	An NxK matrix-like object.
rows	A vector indicating the subset of rows (and/or columns) to operate over. If NULL, no subsetting is done.
cols	A vector indicating the subset of rows (and/or columns) to operate over. If NULL, no subsetting is done.

Details

The S4 methods for x of type matrix, array, or numeric call matrixStats::rowCumsums / matrixStats::colCumsums.

Value

Returns a numeric matrixwith the same dimensions as x.

See Also

• matrixStats::rowCumsums() and matrixStats::colCumsums() which are used when the input is a matrix or numeric vector.

• base::cumsum().

Examples

mat <- matrix(rnorm(15), nrow = 5, ncol = 3)
  mat[2, 1] <- NA
  mat[3, 3] <- Inf
  mat[4, 1] <- 0
  
  print(mat)
  
  rowCumsums(mat)
  colCumsums(mat)

sparseMatrixStats documentation built on Feb. 4, 2021, 2 a.m.