(videolecture07)=

# Videolecture 7. Unsupervised learning

1\. The main ideas behind Principal Component Analysis, with a bit of math.

<p align="center"><iframe width="560" height="315" style='' src="https://www.youtube.com/embed/-AswHf7h0I4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></p>

2\. An overview of (some) clustering techniques.

<p align="center"><iframe width="560" height="315" style='' src="https://www.youtube.com/embed/eVplCo-w4XE" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></p>