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matrixStats (version 0.12.2)

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

Description

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

Usage

## S3 method for class 'matrix':
rowTabulates(x, values=NULL, ...)
  ## S3 method for class 'matrix':
colTabulates(x, values=NULL, ...)

Arguments

x
An integer or raw NxK matrix.
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

Run this code
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))

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