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-   -   HW2.10 out-sample error on original(2D) or transformed (5D) X space? (http://book.caltech.edu/bookforum/showthread.php?t=346)

vmorozov 04-15-2012 02:00 PM
HW2.10 out-sample error on original(2D) or transformed (5D) X space?
 
Regarding homework 2 ,10th question, is it about out-sample error on the transformed (5D) X space? I incline to think so because the previous question talks about transformation. But want to be sure
Thanks
Vlad

yaser 04-15-2012 03:52 PM
Re: HW2.10 out-sample error on original(2D) or transformed (5D) X space?
 
Quote:
Originally Posted by vmorozov (Post 1298)
Regarding homework 2 ,10th question, is it about out-sample error on the transformed (5D) X space? I incline to think so because the previous question talks about transformation. But want to be sure
Thanks
Vlad
Indeed, it is.

rukacity 04-15-2012 05:26 PM
Re: HW2.10 out-sample error on original(2D) or transformed (5D) X space?
 
I may be asking a very silly question but I am stuck here - what are the out of sample points? And given a sample of 1000 points how do we get out of sample points? Is it picking random samples out of these 1000 points? If yes, then how many do we pick?

jcatanz 04-15-2012 09:03 PM
Re: HW2.10 out-sample error on original(2D) or transformed (5D) X space?
 
Quote:
Originally Posted by rukacity (Post 1303)
I may be asking a very silly question but I am stuck here - what are the out of sample points? And given a sample of 1000 points how do we get out of sample points? Is it picking random samples out of these 1000 points? If yes, then how many do we pick?
Here, the 'sample' refers to the training set, the original set of random points (x1,x2) which are used to solve for the the weights.

The 'out-of-sample' points are a new set of random points (x1,x2). This set is used to test how well your weights worked on random points outside the training set, i.e points that were not used to derive them.

rukacity 04-16-2012 10:19 AM
Re: HW2.10 out-sample error on original(2D) or transformed (5D) X space?
 
Quote:
Originally Posted by jcatanz (Post 1312)
Here, the 'sample' refers to the training set, the original set of random points (x1,x2) which are used to solve for the the weights.

The 'out-of-sample' points are a new set of random points (x1,x2). This set is used to test how well your weights worked on random points outside the training set, i.e points that were not used to derive them.
Thank you so much! It clarified a very basic doubt and helped me finish the homework as well ;)

jcatanz 04-17-2012 09:52 AM
Re: HW2.10 out-sample error on original(2D) or transformed (5D) X space?
 
Quote:
Originally Posted by rukacity (Post 1327)
Thank you so much! It clarified a very basic doubt and helped me finish the homework as well ;)
You're welcome!


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