CS 451 class prep 18

1. Watch the following Coursera ML videos in preparation for the next class:
Unsupervised Learning
    3 Video: Unsupervised Learning: Introduction
   12 Video: K-Means Algorithm
    7 Video: Optimization Objective
    7 Video: Random Initialization
    8 Video: Choosing the Number of Clusters

   37 min

2. Make some headway on HW 4 so you can ask questions in class on Friday. Recall that the first portion is already due Monday.