

















• 
The generative
model for



factor analysis
assumes that



the data was
produced in three


stages:



– 
Pick
values independently



for
some hidden factors



that
can have any value




– 
Linearly
combine the



factors
using a factor



loading
matrix. Use more



linear
combinations than



factors.




– 
Add
Gaussian noise that is



the
same for each input.



