combinations | R Documentation |

Returns a matrix containing each possible combination of one entry from vectors of the lengths provided.

combinations(p) powerSetMat(n)

`p` |
vector of non-negative integers. |

`n` |
non-negative integer. |

Returns a matrix, each row being one possible combination of integers from
the vectors *(0, 1,..., p_i - 1)*, for *i*
between 1 and `length(p)`

.

Based on `bincombinations`

from package `e1071`

, which provides
the binary case.

`powerSetMat`

is just a wrapper for `combinations(rep(2, n))`

.

A matrix with number of columns equal to the length of `p`

, and
number of rows equal to *p_1 * ... * p_k*,
each row corresponding to a different combination. Ordering is
reverse-lexographic.

Robin Evans

combinations(c(2,3,3)) powerSetMat(3)

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