You linked it on the bottom of the page, but how do you think the article compares with http://www.cs.otago.ac.nz/cosc453/student_tutorials/principal_components

You linked it on the bottom of the page, but how do you think the article compares with http://www.cs.otago.ac.nz/cosc453/student_tutorials/principal_components.pdf http://www.cs.otago.ac.nz/cosc453/student_tutorials/principa... ? I'm planning to read through it a little more this weekend, but I remember using the PDF and a whiteboard back in the day to understand PCA.