DescTools (version 0.99.43)

CombPairs: Get All Pairs Out of One or Two Sets of Elements

Description

Returns all combinations of 2 out of the elements in x or x and y (if defined). Combinations of the same elements will be dropped (no replacing).

Usage

CombPairs(x, y = NULL)

Arguments

x

a vector of elements

y

a vector of elements, need not be same dimension as x. If y is not NULL then all combination x and y are returned.

Value

CombPairs returns a data.frame with 2 columns X1 and X2.

Details

If y = NULL then all combination of 2 out of x are returned. If y is defined then all combinations of x and y are calculated.

See Also

combn, expand.grid, outer, lower.tri

Examples

# NOT RUN {
CombPairs(letters[1:4])
CombPairs(x = letters[1:4], y = LETTERS[1:2])

# get all pairs of combinations between factors and numerics out of a data.frame
CombPairs(which(sapply(d.pizza, IsNumeric)), which(sapply(d.pizza, is.factor)))
# }