rowMaxs: Calculates the maximum for each row (column) of a matrix-like...

In MatrixGenerics: S4 Generic Summary Statistic Functions that Operate on Matrix-Like Objects

Description

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

Usage

rowMaxs(x, rows = NULL, cols = NULL, na.rm = FALSE, ...)

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

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

colMaxs(x, rows = NULL, cols = NULL, na.rm = FALSE, ...)

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

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

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, NAs are excluded first, otherwise not.
...	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::rowMaxs / matrixStats::colMaxs.

Value

Returns a numeric vector of length N (K).

See Also

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

• For min estimates, see rowMins().

Examples

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

Example output

Loading required package: matrixStats

Attaching package: ‘MatrixGenerics’

The following objects are masked from ‘package:matrixStats’:

    colAlls, colAnyNAs, colAnys, colAvgsPerRowSet, colCollapse,
    colCounts, colCummaxs, colCummins, colCumprods, colCumsums,
    colDiffs, colIQRDiffs, colIQRs, colLogSumExps, colMadDiffs,
    colMads, colMaxs, colMeans2, colMedians, colMins, colOrderStats,
    colProds, colQuantiles, colRanges, colRanks, colSdDiffs, colSds,
    colSums2, colTabulates, colVarDiffs, colVars, colWeightedMads,
    colWeightedMeans, colWeightedMedians, colWeightedSds,
    colWeightedVars, rowAlls, rowAnyNAs, rowAnys, rowAvgsPerColSet,
    rowCollapse, rowCounts, rowCummaxs, rowCummins, rowCumprods,
    rowCumsums, rowDiffs, rowIQRDiffs, rowIQRs, rowLogSumExps,
    rowMadDiffs, rowMads, rowMaxs, rowMeans2, rowMedians, rowMins,
    rowOrderStats, rowProds, rowQuantiles, rowRanges, rowRanks,
    rowSdDiffs, rowSds, rowSums2, rowTabulates, rowVarDiffs, rowVars,
    rowWeightedMads, rowWeightedMeans, rowWeightedMedians,
    rowWeightedSds, rowWeightedVars

          [,1]       [,2]        [,3]
[1,] 1.0223679 -0.4998005  0.59600128
[2,]        NA  2.1708159 -0.08344931
[3,] 1.5672776  1.1632772         Inf
[4,] 0.0000000 -1.5106423 -0.49617953
[5,] 0.6849109 -0.3001238  1.17134300
[1] 1.022368       NA      Inf 0.000000 1.171343
[1]       NA 2.170816      Inf

MatrixGenerics documentation built on Feb. 1, 2021, 2:01 a.m.