Linear regression - constructing X matrix

[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

[yaser]

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 .