From ba1351b918c96407d10608ffb3cd86911103bf26 Mon Sep 17 00:00:00 2001
From: sigpro <x.wangyan@gmail.com>
Date: Tue, 23 Oct 2012 20:35:36 +0800
Subject: [PATCH] fix a bug in ex4

---
 ex4/nnCostFunction.m | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/ex4/nnCostFunction.m b/ex4/nnCostFunction.m
index b7207dd..fdd8412 100644
--- a/ex4/nnCostFunction.m
+++ b/ex4/nnCostFunction.m
@@ -91,10 +91,10 @@
 % temp = (delta_2(:,2:end)*Theta1);
 % temp = temp(:,2:end);
 % delta_1 = temp.*sigmoidGradient(X);
-Theta2_grad(1,:) = delta2(1,:)./m;
-Theta2_grad(2:end,:) = (lambda*Theta2(2:end,:) + delta2(2:end,:))./m;
-Theta1_grad(1,:) = delta1(1,:)./m;
-Theta1_grad(2:end,:) = (lambda*Theta1(2:end,:) + delta1(2:end,:))./m;
+Theta2_grad = delta2./m;
+Theta2_grad(:, 2:end) = (lambda*Theta2(:, 2:end) + delta2(:, 2:end))./m;
+Theta1_grad = delta1./m;
+Theta1_grad(:, 2:end) = (lambda*Theta1(:, 2:end) + delta1(:, 2:end))./m;