Wrapper for creating a swmpr object
Details
This function is a simple wrapper to structure that is used internally within other functions to create a swmpr object. The function does not have to be used explicitly. Attributes of a swmpr object include names, row.names, class, station, parameters, qaqc_cols, cens_cols, date_rng, timezone, stamp_class, metabolism (if present), and metab_units (if present).