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22 lines
714 B
Matlab
22 lines
714 B
Matlab
function [theta] = trainLinearReg(X, y, lambda)
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%TRAINLINEARREG Trains linear regression given a dataset (X, y) and a
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%regularization parameter lambda
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% [theta] = TRAINLINEARREG (X, y, lambda) trains linear regression using
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% the dataset (X, y) and regularization parameter lambda. Returns the
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% trained parameters theta.
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%
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% Initialize Theta
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initial_theta = zeros(size(X, 2), 1);
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% Create "short hand" for the cost function to be minimized
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costFunction = @(t) linearRegCostFunction(X, y, t, lambda);
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% Now, costFunction is a function that takes in only one argument
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options = optimset('MaxIter', 200, 'GradObj', 'on');
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% Minimize using fmincg
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theta = fmincg(costFunction, initial_theta, options);
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end
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