Selects a data frame with variables of a specific scale
Usage
select_items(data, filter = NULL, names_only = FALSE, index_only = FALSE)
Arguments
- data
A data frame with dic information
- filter
A logical expression for any dic attribute (e.g. scale == "ITRF" & subscale == "Int")
- names_only
If TRUE, variable names are returned instead of a data
frame
- index_only
If TRUE, variable indices are returned instead of a data
frame
Value
A data frame, a vector with variable names, or a vector with indices.
