unassigned_plants: Return Data Frame of Plant Species That Have No C Value
Description
Some regional FQA lists contain species which have not been assigned a C Value.
unassigned_plants returns a data frame of plants in x that can be matched
to a regional FQA database but have no C Value. These observations can optionally
be discarded in other fqacalc functions.
Usage
unassigned_plants(x, key = "name", db)
Value
A data frame
Arguments
x
A data frame containing a list of plant species. This data frame
must have one of the following columns: name or acronym. For cover-weighted or
relative functions, this data frame must also have a column called cover containing
cover values and ideally a column containing plot IDs.
key
A character string representing the column that will be used to join
the input data frame x with the regional FQA database. If a value is not specified, the
default is "name". "name" and "acronym" are the only acceptable
values for key.
db
A character string representing the regional FQA database to use. See
db_names for a list of potential values and the fqadata R package
where the databases are hosted.