Chapter 4 typo

[rickiepark]

(P134) In 3rd line at the bottom,
"the 10th position in the sbs.subsets_ attribute and.." should be "the 11th position in the sbs.subsets_ attribute and..", because code is sbs.subsets_[10] not sbs.subsets_[9]

[rickiepark]

(p124) In first paragraph,
"we defined the L2 norm of our weight vector..." should be "we defined the square of L2 norm of our weight vector..." or "we defined the L2 regularization of our weight vector...".

[rasbt]

(P134) In 3rd line at the bottom,
"the 10th position in the sbs.subsets_ attribute and.." should be "the 11th position in the sbs.subsets_ attribute and..", because code is sbs.subsets_[10] not sbs.subsets_[9]

Good catch!

p124) In first paragraph,
"we defined the L2 norm of our weight vector..." should be "we defined the square of L2 norm

Agree. I think "squared L2 norm" would be even better.