/exercises/mlclass-ex1/computeCost.m
Objective C | 19 lines | 14 code | 5 blank | 0 comment | 2 complexity | 135a6836d4d18ec9ffb286e5983162ee MD5 | raw file
1function J = computeCost(X, y, theta) 2%COMPUTECOST Compute cost for linear regression 3% J = COMPUTECOST(X, y, theta) computes the cost of using theta as the 4% parameter for linear regression to fit the data points in X and y 5 6% Initialize some useful values 7m = length(y); % number of training examples 8 9% You need to return the following variables correctly 10J = 0; 11 12% ====================== YOUR CODE HERE ====================== 13% Instructions: Compute the cost of a particular choice of theta 14% You should set J to the cost. 15 16J = sum(((X*theta)-y).^2)/(2*m); 17% ========================================================================= 18 19end