Machine learning on Big data

April 15, 2014 Leave a comment

I just viewed the webinar conducted by SkyTree. This particular slide has some information about the evolution of Machine Learning.

Screen Shot 2014-04-15 at 9.14.24 PM

Filed under Machine Learning

Gradient checking quiz

April 15, 2014 2 Comments

Let J(\theta) = \theta^3. Furthermore, let \theta = 1 and \epsilon=0.01. You use the formula

(J(\theta+\epsilon )- J(\theta-\epsilon))/2\epsilon

to approximate the derivative. What value do you get using this approximation ?(When \theta=1,the true, exact derivative is
d/d\theta J(\theta) = 3 ).

The Octave code that I used to solve this is 

((1+0.01)^3-(1-0.01)^3)/(2*0.10)

3.0001

Filed under Machine Learning