Design a new function adding taxonomic ranks in reference to existing ranks.
This function may looks like this:
add_levels(x, before, after)
where x is a character vector with the names of ranks to be inserted, before is a vector of the same length of x indicating before which ranks the new ranks have to be inserted, and after (ignored if before not missing).
Design a new function adding taxonomic ranks in reference to existing ranks.
This function may looks like this:
where
xis a character vector with the names of ranks to be inserted,beforeis a vector of the same length ofxindicating before which ranks the new ranks have to be inserted, andafter(ignored ifbeforenot missing).