From bc80f7829dda794305fbaa0334097964c41556eb Mon Sep 17 00:00:00 2001
From: Martin Siggel <martin.siggel@dlr.de>
Date: Thu, 22 Mar 2018 07:04:08 +0100
Subject: [PATCH] Fixed error of gradient computation in NN
---
classification/Neural Networks.ipynb | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/classification/Neural Networks.ipynb b/classification/Neural Networks.ipynb
index f97a090..7052c06 100644
--- a/classification/Neural Networks.ipynb
+++ b/classification/Neural Networks.ipynb
@@ -148,7 +148,7 @@
"\n",
"- $dz_\\dagger^{(3)} = \\frac 1 m (h - y) $ (Error of the output layer)\n",
"- $d\\theta_\\dagger^{(2)} = {a^{(2)}}^T dz_\\dagger^{(3)}$ (Gradient of $\\theta_2$)\n",
- "- $d{a_\\dagger^{(2)}} = d\\theta_\\dagger^{(2)} {dz_\\dagger^{(3)}}^T$\n",
+ "- $d{a_\\dagger^{(2)}} = \\theta^{(2)} {dz_\\dagger^{(3)}}^T$\n",
"- remove first row from $d{a_\\dagger^{(2)}}$\n",
"- $dz_\\dagger^{(2)} = d{a_\\dagger^{(2)}} \\frac d {dz}\\sigma(z^{(2)}) $ (Error of the hidden layer)\n",
"- $d\\theta_\\dagger^{(1)} = {a^{(1)}}^T dz_\\dagger^{(2)}$ (Gradient of $\\theta_1$)\n",
--
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