d305406dfd
* docs: Fix typo in doc for categorical transformer. * feat: Add option to take a column from Matrix. I created the method `Matrix::take_column` that uses the `Matrix::take`-interface to extract a single column from a matrix. I need that feature in the implementation of `StandardScaler`. * feat: Add `StandardScaler`. Authored-by: titoeb <timtoebrock@googlemail.com>