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schneems · Nov 19, 2011 · 896b01c · 896b01c
1 parent 591e29e
commit 896b01c
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/mlclass-ex5/mlclass-ex5/linearRegCostFunction.m b/mlclass-ex5/mlclass-ex5/linearRegCostFunction.m
@@ -23,6 +23,15 @@
 
 
 
+h = X*theta;
+
+% regularize theta by removing first value
+theta_reg = [0;theta(2:end, :);];
+J = (1/(2*m))*sum((h-y).^2)+(lambda/(2*m))*theta_reg'*theta_reg;
+
+grad = (1/m)*(X'*(h-y)+lambda*theta_reg);
+
+