vecsets (version 1.4)

vintersect: Perform intersection of two vectors, including counting repeated elements.

Description

Unlike the base::intersect function, if the vectors have repeated elements in common, the intersection returns as many of these elements as are in whichever vector has fewer of them.

Usage

vintersect(x, y, multiple = TRUE)

Value

A vector of the elements in the intersection of the two vectors. If multiple=FALSE is set, only unique values are returned. If the intersection is empty, an empty vector of same type is returned, mimicking base::intersect.

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, vintersect acts like the base::intersect function.

Author

Carl Witthoft, with some code taken from Sven Hohenstein via Stack Overflow

See Also

intersect, the CRAN package sets

Examples

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