From 10c0bcc04421962c4af1b199b01fa7425214492f Mon Sep 17 00:00:00 2001
From: llaltxll <evanov@gmail.com>
Date: Sat, 27 Mar 2021 09:55:17 +0300
Subject: [PATCH] Update featureNormalize.m

---
 mlclass-ex1/featureNormalize.m | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/mlclass-ex1/featureNormalize.m b/mlclass-ex1/featureNormalize.m
index b8a7213..08f734e 100644
--- a/mlclass-ex1/featureNormalize.m
+++ b/mlclass-ex1/featureNormalize.m
@@ -29,12 +29,15 @@
 mu    = mean(X)
 sigma = std(X)
 
-indicies = 1:size(X, 2);
+% indicies = 1:size(X, 2);
 
-for i = indicies,
-  XminusMu  = X(:, i) - mu(i);
-  X_norm(:, i) = XminusMu / sigma(i);
-end
+% for i = indicies,
+%  XminusMu  = X(:, i) - mu(i);
+%  X_norm(:, i) = XminusMu / sigma(i);
+%end
+
+% in octave we can just do this:
+X_norm = (X .- mu)./sigma;
 
 
 % ============================================================