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Regularized Gradient

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neingeist 2014-11-27 23:50:42 +01:00
parent 111a0d1cca
commit 10ef3bd80e
1 changed files with 7 additions and 2 deletions
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9
ex8/cofiCostFunc.m
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@ -44,8 +44,13 @@ J = 0.5 * sum(sum(R.*(X*Theta'-Y).^2)) ...
+ 0.5 * lambda * sum(sum(Theta.^2)) ...
+ 0.5 * lambda * sum(sum(X.^2));
X_grad = (R.*(X*Theta'-Y))*Theta; % mov X user * uxer X feat = mov X feat
Theta_grad = (R.*(X*Theta'-Y))'*X; % user X mov * mov X feat = user X feat
% mov X user * uxer X feat = mov X feat
X_grad = (R.*(X*Theta'-Y))*Theta ...
+ lambda*X;
% user X mov * mov X feat = user X feat
Theta_grad = (R.*(X*Theta'-Y))'*X ...
+ lambda*Theta;
% =============================================================