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

In DelayedMatrixStats: Functions that Apply to Rows and Columns of 'DelayedMatrix' Objects

Description

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

Usage

## S4 method for signature 'DelayedMatrix'
colTabulates(
  x,
  rows = NULL,
  cols = NULL,
  values = NULL,
  force_block_processing = FALSE,
  ...
)

## S4 method for signature 'DelayedMatrix'
rowTabulates(
  x,
  rows = NULL,
  cols = NULL,
  values = NULL,
  force_block_processing = FALSE,
  ...
)

Arguments

x	A NxK DelayedMatrix.
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.
force_block_processing	FALSE (the default) means that a seed-aware, optimised method is used (if available). This can be overridden to use the general block-processing strategy by setting this to TRUE (typically not advised). The block-processing strategy loads one or more (depending on \link[DelayedArray]{getAutoBlockSize}()) columns (colFoo()) or rows (rowFoo()) into memory as an ordinary base::array.
...	Additional arguments passed to specific methods.

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.

Author(s)

Peter Hickey

See Also

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

• base::table()

Examples

# A DelayedMatrix with a 'DataFrame' seed
dm_DF <- DelayedArray(S4Vectors::DataFrame(C1 = rep(1L, 5),
                                           C2 = as.integer((0:4) ^ 2),
                                           C3 = seq(-5L, -1L, 1L)))

colTabulates(dm_DF)

rowTabulates(dm_DF)

DelayedMatrixStats documentation built on Feb. 5, 2021, 2:04 a.m.