invert_indexes {rbmi} | R Documentation |
Invert and derive indexes
Description
Takes a list of elements and creates a new list containing 1 entry per unique element value containing the indexes of which original elements it occurred in.
Usage
invert_indexes(x)
Arguments
x |
list of elements to invert and calculate index from (see details). |
Details
This functions purpose is best illustrated by an example:
input:
list( c("A", "B", "C"), c("A", "A", "B"))}
becomes:
list( "A" = c(1,2,2), "B" = c(1,2), "C" = 1 )
[Package rbmi version 1.2.6 Index]