Thread: Exercise 4.4
View Single Post
Old 08-24-2015, 06:04 AM
magdon's Avatar
magdon magdon is offline
Join Date: Aug 2009
Location: Troy, NY, USA.
Posts: 597
Default Re: Exercise 4.4

E_{in}(w) is given in eq. (4.2). The exercise is asking you to rewrite this expression using w_{lin} and H as defined in the problem.

w is a variable parameter, it is not known. It is to be obtained by optimizing E_{in}(w).

Originally Posted by prithagupta.nsit View Post
For Exercise 4.4

I am not able to understand that in this exercise 4.4, what is actually w and do we have to consider the regularizatio also and if the formulae:
Ein(w) =1/N (Zwlin − y)T * (Zwlin − y)

how can w-wlin come in picture.
by this formula I am able to get the second term but not the second term?
Can anyone help me derive this expression or can anyone share his/her solution with me.
same is the Ein used here??? is it out of sample error... I am not able to understand the conflict. What my understanding is that we have derived wlin but for a variable vector we first check how much does it vary from the wlin and multiplied by Z vector gives us how much function vary from average hypothesis and the second term gives us the error of Wlin predicting outputs. Is my understanding right??
Have faith in probability
Reply With Quote