cdb_id_studies.Rd
Creates a vector of integer study identifiers corresponding to the rows of a CompadreDB object, based on unique combinations of the columns 'Authors', 'Journal', 'YearPublication', and 'DOI.ISBN' (or optionally, a different set of columns supplied by the user).
cdb_id_studies(cdb, columns = c("Authors", "Journal", "YearPublication", "DOI.ISBN"))
cdb | A CompadreDB object |
---|---|
columns | Vector of column names from which unique combinations should
be identified. Defaults to |
Vector of integer study identifiers corresponding to the rows of
cdb
, based on unique combinations of the elements in columns
.
Identifiers are assigned by pasting together the relevant columns, assigning factor levels based on alphabetical order, and then converting the factor levels to integers.
Compadre$StudyID <- cdb_id_studies(Compadre)