吴恩达机器学习 - 正规函数

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				版权声明：如果感觉写的不错，转载标明出处链接哦~blog.csdn.net/wyg1997					https://blog.csdn.net/wyg1997/article/details/80725963				</div>
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						<p>题目链接：<a href="https://s3.amazonaws.com/spark-public/ml/exercises/on-demand/machine-learning-ex1.zip" rel="nofollow" target="_blank">点击打开链接</a></p>

老规矩先贴笔记

按照公式写代码就可以啦：

normalEqn.m:

function [theta] = normalEqn(X, y)
%NORMALEQN Computes the closed-form solution to linear regression 
%   NORMALEQN(X,y) computes the closed-form solution to linear 
%   regression using the normal equations.

theta = zeros(size(X, 2), 1);

% ====================== YOUR CODE HERE ======================
% Instructions: Complete the code to compute the closed form solution
%               to linear regression and put the result in theta.
%

% ---------------------- Sample Solution ----------------------

theta = pinv(X'*X)*X'*y;


% -------------------------------------------------------------


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

end

  
  

   
   
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