This function filters a data frame based on a specified schema, which
defines the columns to keep. It also handles special case where data
needs to be reshaped to long format before filtering.
Usage
extract_schema_columns(data, schema_name)
Arguments
- data
An accident data object.
- schema_name
A character string specifying the schema to use for
filtering.
Value
A data frame containing only the columns defined in the schema, or
NULL.
Examples
if (FALSE) { # \dontrun{
person_info <- extract_schema_columns(accident_data, "person_info")
} # }
