Abu-Mostafa's Learning From Data[0] was more more rigorous, in my experience. It's a full-fledged Caltech course, sometimes taught on EdX concurrently with on-campus sessions.
The Ng class was a good introduction, but it was mostly applications, not the mathematics and theory behind them.
It is starting again on September 17, 2017 though you can access some of the material already.[1] In addition to the quality of the content, one of the most amazing things about previous offerings is just how involved he has been in the forums, directly helping students.
The Ng class was a good introduction, but it was mostly applications, not the mathematics and theory behind them.
[0] https://work.caltech.edu/telecourse.html