matrixStats (version 0.53.0)

rowTabulates: Tabulates the values in a matrix by row (column)

Description

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

Usage

rowTabulates(x, rows = NULL, cols = NULL, values = NULL, ...)
colTabulates(x, rows = NULL, cols = NULL, values = NULL, ...)

Arguments

x

An integer, a logical, or a raw NxK matrix.

rows, cols

A vector indicating subset of rows (and/or columns) to operate over. If NULL, no subsetting is done.

values

An vector of J values of count. If NULL, all (unique) values are counted.

...

Not used.

Value

Returns a NxJ (KxJ) matrix where N (K) is the number of row (column) vectors tabulated and J is the number of values counted.

Examples

# NOT RUN {
x <- matrix(1:5, nrow = 10, ncol = 5)
print(x)
print(rowTabulates(x))
print(colTabulates(x))
# Count only certain values
print(rowTabulates(x, values = 1:3))


y <- as.raw(x)
dim(y) <- dim(x)
print(y)
print(rowTabulates(y))
print(colTabulates(y))
# }