Notes-ML-AndrewNg/assignments/machine-learning-ex1/ex1/computeCostMulti.m

function J = computeCostMulti(X, y, theta)
%COMPUTECOSTMULTI Compute cost for linear regression with multiple variables
%   J = COMPUTECOSTMULTI(X, y, theta) computes the cost of using theta as the
%   parameter for linear regression to fit the data points in X and y

% Initialize some useful values
m = length(y); % number of training examples

% You need to return the following variables correctly 
J = 0;

% ====================== YOUR CODE HERE ======================
% Instructions: Compute the cost of a particular choice of theta
%               You should set J to the cost.
J = 1 / 2 / m * sum((X * theta - y) .^ 2);
%J = 1 / 2 / m * (X * theta - y)' * (X * theta - y);



% =========================================================================

end