Hi Jao, Here's one option: http://spark.apache.org/docs/latest/ml-features.html#stringindexer "StringIndexer encodes a string column of labels to a column of label indices. The indices are in [0, numLabels), ordered by label frequencies."
Xinh On Tue, Jun 28, 2016 at 12:29 AM, Jaonary Rabarisoa <jaon...@gmail.com> wrote: > Dear all, > > I'm trying to a find a way to transform a DataFrame into a data that is > more suitable for third party classification algorithm. The DataFrame have > two columns : "feature" represented by a vector and "label" represented by > a string. I want the "label" to be a number between [0, number of classes - > 1]. > Do you have any ideas to do it efficiently ? > > Cheers, > > Jao >
