Creates a new data frame where the specified columns are expanded based on runtime structure of the objects they store. A column can be expanded if it is `Series<string, T>` or `IDictionary<K, V>` or if it is any .NET object with readable properties. ## Example Given a data frame with a series that contains tuples, you can expand the tuple members and get a frame with columns `S.Item1` and `S.Item2`: let df = frame [ "S" => series [ 1 => (1, "One"); 2 => (2, "Two") ] ] df |> Frame.expandCols ["S"] ## Parameters - `names` - Names of columns in the original data frame to be expanded - `frame` - Input data frame whose columns will be expanded [category:Sorting and index manipulation]

public static Frame<R, string> ExpandColumns<R>(
	IEnumerable<string> names,
	Frame<R, string> frame
)