rowVars {MatrixGenerics}R Documentation

Calculates the variance for each row (column) of a matrix-like object

Description

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

Usage

rowVars(x, rows = NULL, cols = NULL, na.rm = FALSE, center = NULL, ...,
  useNames = TRUE)

## S4 method for signature 'matrix_OR_array_OR_table_OR_numeric'
rowVars(x, rows = NULL,
  cols = NULL, na.rm = FALSE, center = NULL, dim. = dim(x), ...,
  useNames = TRUE)

## S4 method for signature 'ANY'
rowVars(x, rows = NULL, cols = NULL, na.rm = FALSE,
  center = NULL, ..., useNames = TRUE)

colVars(x, rows = NULL, cols = NULL, na.rm = FALSE, center = NULL, ...,
  useNames = TRUE)

## S4 method for signature 'matrix_OR_array_OR_table_OR_numeric'
colVars(x, rows = NULL,
  cols = NULL, na.rm = FALSE, center = NULL, dim. = dim(x), ...,
  useNames = TRUE)

## S4 method for signature 'ANY'
colVars(x, rows = NULL, cols = NULL, na.rm = FALSE,
  center = NULL, ..., 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.

na.rm

If TRUE, missing values (NA or NaN) are omitted from the calculations.

center

(optional) the center, defaults to the row means.

...

Additional arguments passed to specific methods.

useNames

If TRUE (default), names attributes of result are set. Else if FALSE, no naming support is done.

dim.

An integer vector of length two specifying the dimension of x, essential when x is a numeric vector. Note, that this is not a generic argument and not all methods need provide it.

Details

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

Value

Returns a numeric vector of length N (K).

See Also

Examples

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

print(mat)

rowVars(mat)
colVars(mat)
[Package MatrixGenerics version 1.22.0 Index]