gistfile1.txt

function J = computeCost(X, y, theta)
%COMPUTECOST Compute cost for linear regression
%   J = COMPUTECOST(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.



h = X * theta;
error = h - y;
error_sqr = error.^2;

J = { 1 / ( 2 * m ) * ( sum ( error_sqr ) ) };
fprintf('Finished the second exercise\n');
% =========================================================================

end