Video
Machine Learning: Linear Regression based on Least Squares
An example of using least squares to do data fitting. In this example, we demonstrate how to 1) fit a straight line using ordinary least-squares method, and 2) estimate value of a new input based on the fitted line.
It helps me understand the concept of least square. It introduces the concept in a easy way. The content is very clear. It also provides a example on how to use the matrix equation. The animation and the presentation is attractive. The video is very reliable since it is produced by a LSGI professor.