R: Calculates the cumulative maxima for each row (column) of a...

rowCummaxs {MatrixGenerics}

R Documentation

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

Description

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

Usage

rowCummaxs(x, rows = NULL, cols = NULL, ...)

## S4 method for signature 'matrix'
rowCummaxs(x, rows = NULL, cols = NULL, dim. = dim(x), ...)

## S4 method for signature 'numeric'
rowCummaxs(x, rows = NULL, cols = NULL, dim. = dim(x), ...)

## S4 method for signature 'array'
rowCummaxs(x, rows = NULL, cols = NULL, dim. = dim(x), ...)

colCummaxs(x, rows = NULL, cols = NULL, ...)

## S4 method for signature 'matrix'
colCummaxs(x, rows = NULL, cols = NULL, dim. = dim(x), ...)

## S4 method for signature 'numeric'
colCummaxs(x, rows = NULL, cols = NULL, dim. = dim(x), ...)

## S4 method for signature 'array'
colCummaxs(x, rows = NULL, cols = NULL, dim. = dim(x), ...)

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.
`...`	Additional arguments passed to specific methods.
`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, or numeric call matrixStats::rowCummaxs / matrixStats::colCummaxs.

Value

Returns a numeric matrix with the same dimensions as x.

Examples

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

[Package MatrixGenerics version 0.99.0 Index]