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Restore WQP attributes after column removal

Source: R/retain_wqp_attributes.R
retain_wqp_attributes.Rd

This function restores attributes that are lost when empty columns are removed from a Water Quality Portal (WQP) data download. It is intended to be used after applying janitor::remove_empty("cols") (or similar) to a WQP data frame, which drops important metadata stored as attributes (e.g., site information, characteristic metadata, and request URLs).

Usage

retain_wqp_attributes(data_full, data_reduced)

Arguments

data_full

A data frame returned directly from the Water Quality Portal (WQP) download function dataRetrieval::readWQPdata(), containing the full set of WQP attributes.

data_reduced

A data frame derived from data_full with empty columns removed (e.g., via janitor::remove_empty("cols")), which has lost some or all of the original attributes.

Value

A data frame with the same columns as data_reduced and the attributes from data_full restored where missing. The returned object preserves WQP metadata such as site information, variable descriptions, and request details.

Details

The function copies attributes from the original full data frame and re-attaches any attributes that are missing from the reduced data frame, returning a data frame with fewer columns but the original WQP metadata intact.

See also

janitor::remove_empty(), get_wqp_data()

Examples

if (FALSE) { # \dontrun{
full <- get_wqp_data(...)
reduced <- janitor::remove_empty(full, "cols")
restored <- retain_wqp_attributes(full, reduced)
} # }