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Why is theta only one-dimensional?
Hi,
I'm currently working on this exercise and thanks alot for sharing your result. But there is one thing bothering me because I cannot understand. In line 47 you calcutated theta ("theta = trainLinearReg(X, y, lambda);"). I assumed that that would be 2-dimensional not one-dimensional since the matrix X has to have the form "[ones(m, 1) X]" (I assumed). Why are you using just X and not [ones(m, 1) X]? Could you please explaint that to me, would be much appreciated.
Have a nice day and thank you in advance.
Feature Normalization unit test not pass
there should be a 'nice work!' after Feature Normalization.
This should be the sigmoid function
Hey just wondering since this is logistic regression as opposed to liner, shouldn't the hypothesis be sigmoid:-
[~,p]=max(sigmoid(X*all_theta'),[],2);
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