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group_rows_indices

miniextendr_api::dataframe::group

Function group_rows_indices 

Source 
fn group_rows_indices(
    elt: SEXP,
    group: usize,
    nrow: usize,
) -> Result<Vec<usize>, DataFrameError>
Expand description

Convert one .rows list element — an integer vector of 1-based row indices (DataFrame::groups_attr checked its type) — into 0-based indices, rejecting any index outside 1..=nrow (NA included).