colTabulates-xgCMatrix-method: Tabulates the values in a matrix-like object by row (column)

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

Description

Tabulates the values in a matrix-like object by row (column).

Usage

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

## S4 method for signature 'xgCMatrix'
rowTabulates(x, rows = NULL, cols = NULL, values = 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.
values	the values to search for.

Details

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

Value

a numeric NxJ (KxJ) matrix, where N (K) is the number of rows (columns) for which the J values are calculated.

See Also

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

• base::table()

Examples

mat <- matrix(rpois(15, lambda = 3), nrow = 5, ncol = 3)
  mat[2, 1] <- NA_integer_
  mat[3, 3] <- 0L
  mat[4, 1] <- 0L
  
  print(mat)
  
  rowTabulates(mat)
  colTabulates(mat)
  
  rowTabulates(mat, values = 0)
  colTabulates(mat, values = 0)

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