PLA and Regression implementation issue

[edeas]

Please i would like to know if there is a difference between padding my feature vectors with 1 or -1.

I used -1 in hw1 because it seemed more logical, as the threshold (theta-zero) would change sign when it moves to the other side of the equation.

Now for the regression equation, i am abit confused of what is actually the correct approach. (Though i am assuming it doesnt matter).

what am i not getting?

[yaser]

Originally Posted by edeas

Please i would like to know if there is a difference between padding my feature vectors with 1 or -1.

I used -1 in hw1 because it seemed more logical, as the threshold (theta-zero) would change sign when it moves to the other side of the equation.

Now for the regression equation, i am abit confused of what is actually the correct approach. (Though i am assuming it doesnt matter).

what am i not getting?

Setting or is equivalent, with the corresponding weight parameter changing signs accordingly. In this course, we adopted the convention , treating as a "bias" term rather than a threshold.