Extracts a named element from a list of lists.
asMatrixCols(xs, row.names, col.names)asMatrixRows(xs, row.names, col.names)
[matrix].
[list]
A list of vectors of the same length.
[character | integer | NULL]
Row names of result.
Default is to take the names of the elements of xs.
[character | integer | NULL]
Column names of result.
Default is to take the names of the elements of xs.