LFD Book Forum Linear regression - constructing X matrix
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#1
04-15-2012, 03:45 PM
 folktheory Junior Member Join Date: Apr 2012 Posts: 3
Linear regression - constructing X matrix

Hello, I have a pretty straightforward question.

When we make the X matrix (that we then use to obtain X-dagger), should we include the x0's in there (that is, a column of ones) or do we leave those out?

Thanks
#2
04-15-2012, 05:59 PM
 yaser Caltech Join Date: Aug 2009 Location: Pasadena, California, USA Posts: 1,477
Re: Linear regression - constructing X matrix

Quote:
 Originally Posted by folktheory Hello, I have a pretty straightforward question. When we make the X matrix (that we then use to obtain X-dagger), should we include the x0's in there (that is, a column of ones) or do we leave those out? Thanks
Yes, the coordinate is included in all data points , so there is a column of 1's in the matrix .
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