#1




Homework#6 Q3

#2




Re: Homework#6 Q3
Quote:
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#3




Re: Homework#6 Q3

#4




Re: Homework#6 Q3
Quote:
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Where everyone thinks alike, no one thinks very much 
#5




Re: Homework#6 Q3

#6




Re: Homework#6 Q3
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Where everyone thinks alike, no one thinks very much 
#7




Re: Homework#6 Q3
I am confused. Are we supposed to rederive the result of Slide 11?

#8




Re: Homework#6 Q3
No rederivation needed. You can always use the results given in the lectures.
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Where everyone thinks alike, no one thinks very much 
#9




Re: Homework#6 Q3
My answers for any value of K are order(s) of magnitude higher that the options.
w_reg = (Z^\top Z + λI)^1 Z^T y As a Python noob, perhaps someone can confirm that I need the linalg.inv of the first term in parentheses, because we cannot use the pinv method when the weight term is present. thanks. Last edited by Kekeli; 05132013 at 06:04 AM. Reason: Realized the upper bound isn't the issue 
#10




Re: Homework#6 Q3
Kekeli:
I don't know about Python, but in R I was using the "chol2inv" function of the "Matrix" library to find the matrix inverse. It turns out this wasn't the right tool for the job. I ended up using "solve" from the base package to find the inverse. So in R, I used the following functions: 
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