R: Count Binary Patterns

countpattern {e1071} | R Documentation

## Count Binary Patterns

### Description

Every row of the binary matrix `x` is transformed into a binary pattern and these patterns are counted.

### Usage

    countpattern(x, matching=FALSE)

### Arguments

`x` | A matrix of binary observations
`matching` | If TRUE an additional vector is returned which stores which row belongs to which pattern

### Value

A vector of length `2\^ncol(x)` giving the number of times each pattern occurs in the rows of `x`. The names of this vector are the binary patterns. They are sorted according to their numeric value. If `matching` is `TRUE`, a list of the following two vectors is returned.

`pat` | Numbers of patterns as described above.
`matching` | Vector giving the position of the pattern of each row of `x` in `pat`.

### Author(s)

Andreas Weingessel

### Examples

    xx <- rbind(c(1,0,0),c(1,0,0),c(1,0,1),c(0,1,1),c(0,1,1))
    countpattern(xx)
    countpattern(xx, matching=TRUE)

[Package e1071 version 1.7-3 Index]