vecsets (version 1.4)

vunion: Returns the union of its inputs including repeated elements.

Description

The base::union function removes duplicates per algebraic set theory. vunion does not, and so returns as many duplicate elements as are in either input vector (not the sum of their inputs.) In short, vunion is the same as vintersect(x,y) + vsetdiff(x,y) + vsetdiff(y,x).

Usage

vunion(x, y, multiple = TRUE)

Value

A vector of the union of the two input vectors. If multiple is set to FALSE then the value returned is the same as base::union.

Arguments

x

A vector or an object which can be coerced to a vector

y

A vector or an object which can be coerced to a vector

multiple

Should repeated "multiple" items be returned? Default is TRUE; if set to FALSE, vunion acts like the base::vunion function.

Author

Carl Witthoft

See Also

union, the CRAN package sets

Examples

x <- c(1:5,3,3,3,2,NA,NA)
y<- c(2:5,4,3,NA)
vunion(x,y)
vunion(x,y,multiple=FALSE) 
union(x,y) #same as previous line