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CS229 Lecture Notes
for linear regression has only one global, and no other local, optima; thus gradient descent always converges (assuming the learning rate is not too large) to the global minimum. Indeed, J is a convex quadratic function. Here is an example of gradient descent as it is run to minimize a quadratic function. 5 10 15 20 25 30 35 40 45 50 5 10 15 20 ...
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