Create a vector of unique study identifiers from a COM(P)ADRE database

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")
)

Arguments

cdb

A CompadreDB object

columns

Vector of column names from which unique combinations should be identified. Defaults to c("Authors", "Journal", "YearPublication", "DOI_ISBN").

Value

Vector of integer study identifiers corresponding to the rows of

cdb, based on unique combinations of the elements in columns.

Details

Identifiers are assigned by pasting together the relevant columns, assigning factor levels based on alphabetical order, and then converting the factor levels to integers.

See also

cdb_id

Other data management: cdb_flatten(), cdb_id_stages(), cdb_id(), cdb_mean_matF(), cdb_rbind(), cdb_unflatten(), cdb_unnest(), mat_elementwise_apply(), mpm_mean(), mpm_median(), mpm_sd(), string_representation

Author

Patrick Barks <patrick.barks@gmail.com>

Examples

Compadre$StudyID <- cdb_id_studies(Compadre)