Ah makes sense. No, coordinate descent is a stupider gradient-optional method: https://en.wikipedia.org/wiki/Coordinate_descent https://en.wikipedia.org/wiki/C

Ah makes sense. No, coordinate descent is a stupider gradient-optional method: https://en.wikipedia.org/wiki/Coordinate_descent https://en.wikipedia.org/wiki/Coordinate_descent It's slow and sub-optimal, but the code is very easy to follow and you don't have to wonder whether your gradient is correct.