LFD Book Forum HW2.10 out-sample error on original(2D) or transformed (5D) X space?
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#1
04-15-2012, 02:00 PM
 vmorozov Junior Member Join Date: Apr 2012 Posts: 4
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
#2
04-15-2012, 03:52 PM
 yaser Caltech Join Date: Aug 2009 Location: Pasadena, California, USA Posts: 1,478
Re: HW2.10 out-sample error on original(2D) or transformed (5D) X space?

Quote:
 Originally Posted by vmorozov 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.
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#3
04-15-2012, 05:26 PM
 rukacity Member Join Date: Apr 2012 Posts: 21
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?
#4
04-15-2012, 09:03 PM
 jcatanz Member Join Date: Apr 2012 Posts: 41
Re: HW2.10 out-sample error on original(2D) or transformed (5D) X space?

Quote:
 Originally Posted by rukacity 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.
#5
04-16-2012, 10:19 AM
 rukacity Member Join Date: Apr 2012 Posts: 21
Re: HW2.10 out-sample error on original(2D) or transformed (5D) X space?

Quote:
 Originally Posted by jcatanz 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
#6
04-17-2012, 09:52 AM
 jcatanz Member Join Date: Apr 2012 Posts: 41
Re: HW2.10 out-sample error on original(2D) or transformed (5D) X space?

Quote:
 Originally Posted by rukacity 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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