colCounts-xgCMatrix-method: Count how often an element in a row (column) of a matrix-like...

In const-ae/sparseMatrixStats: Summary Statistics for Rows and Columns of Sparse Matrices

Count how often an element in a row (column) of a matrix-like object is equal to a value

Description

Count how often an element in a row (column) of a matrix-like object is equal to a value.

Usage

## S4 method for signature 'xgCMatrix'
colCounts(
  x,
  rows = NULL,
  cols = NULL,
  value = TRUE,
  na.rm = FALSE,
  useNames = TRUE
)

## S4 method for signature 'xgCMatrix'
rowCounts(
  x,
  rows = NULL,
  cols = NULL,
  value = TRUE,
  na.rm = FALSE,
  useNames = TRUE
)

Arguments

x	An NxK matrix-like object.
rows, cols	A vector indicating the subset of rows (and/or columns) to operate over. If NULL, no subsetting is done.
value	The value to search for.
na.rm	If TRUE, missing values (NA or NaN) are omitted from the calculations.
useNames	If TRUE (default), names attributes of result are set. Else if FALSE, no naming support is done.

Details

The S4 methods for x of type matrix, array, table, or numeric call matrixStats::rowCounts / matrixStats::colCounts.

Value

Returns a integer vector of length N (K).

See Also

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

• For checks if any element is equal to a value, see rowAnys(). To check if all elements are equal, see rowAlls().

Examples

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

print(mat)

rowCounts(mat)
colCounts(mat)
  rowCounts(mat, value = 0)
  colCounts(mat, value = Inf, na.rm = TRUE)

const-ae/sparseMatrixStats documentation built on April 10, 2024, 5:27 p.m.