From 941db6fa26a1e13144cad6cc2046aa1063f60f04 Mon Sep 17 00:00:00 2001
From: changqi <84911039+comeonsunny@users.noreply.github.com>
Date: Sat, 21 May 2022 09:24:28 +0800
Subject: [PATCH] use the vectorization to accelerate the calculation

% ====================== YOUR CODE HERE ======================
% Instructions: Compute the cost of a particular choice of theta
%               You should set J to the cost.
sum = 0;
temp_cost = X * theta - y;
for i = 1:m
    sum = sum + temp_cost(i)^2;
end

J = (1/(2*m))*sum;
---
 ex1/computeCost.m | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/ex1/computeCost.m b/ex1/computeCost.m
index 4570dbb..170e3d1 100644
--- a/ex1/computeCost.m
+++ b/ex1/computeCost.m
@@ -19,7 +19,16 @@
 % Instructions: Compute the cost of a particular choice of theta
 %               You should set J to the cost.
 
+% ====================== YOUR CODE HERE ======================
+% Instructions: Compute the cost of a particular choice of theta
+%               You should set J to the cost.
+% sum = 0;
+% temp_cost = X * theta - y;
+% for i = 1:m
+%     sum = sum + temp_cost(i)^2;
+% end
 
+% J = (1/(2*m))*sum;