Resolve column names from a prefix pattern or explicit vector

Helper to standardise column selection across functions. If prefix is a single string it is used as a grepl pattern against df_names; if it is a character vector of length > 1 it is used directly as column names.

Usage

resolveColumns(df_names, prefix)

Arguments

df_names

Character vector of column names (i.e. names(df)).

prefix

Either a single character string pattern or a character vector of explicit column names.

Value

A character vector of resolved column names.