Exercise 4.4
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 wwlin 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. http://book.caltech.edu/bookforum/showthread.php?t=4512 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?? 
Re: Exercise 4.4
is given in eq. (4.2). The exercise is asking you to rewrite this expression using and as defined in the problem.
is a variable parameter, it is not known. It is to be obtained by optimizing . Quote:

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