is_comb_element_of: Is drug combination element of given vector?
Description
Use this function to determine if a drug combination is part of a vector of
other drug combinations. We take care only of pair-wise drug combinations and
an internal check is done for alternative drug names, e.g. we check if
A-B combination is included, but also for B-A.
Usage
is_comb_element_of(drug.comb, comb.vector)
Arguments
drug.comb
a string in the form A-B (no spaces between the names
and the hyphen '-')
comb.vector
a character vector of drug combinations, each one in the
form drugname.1-drugname.2
Value
logical, depending if the drug combination is element of the given
vector or not.