diff --git a/ex1/featureNormalize.m b/ex1/featureNormalize.m index bb5d072..be3507f 100644 --- a/ex1/featureNormalize.m +++ b/ex1/featureNormalize.m @@ -1,5 +1,5 @@ function [X_norm, mu, sigma] = featureNormalize(X) -%FEATURENORMALIZE Normalizes the features in X +%FEATURENORMALIZE Normalizes the features in X % FEATURENORMALIZE(X) returns a normalized version of X where % the mean value of each feature is 0 and the standard deviation % is 1. This is often a good preprocessing step to do when @@ -13,22 +13,18 @@ sigma = zeros(1, size(X, 2)); % ====================== YOUR CODE HERE ====================== % Instructions: First, for each feature dimension, compute the mean % of the feature and subtract it from the dataset, -% storing the mean value in mu. Next, compute the +% storing the mean value in mu. Next, compute the % standard deviation of each feature and divide % each feature by it's standard deviation, storing -% the standard deviation in sigma. +% the standard deviation in sigma. % -% Note that X is a matrix where each column is a -% feature and each row is an example. You need -% to perform the normalization separately for -% each feature. +% Note that X is a matrix where each column is a +% feature and each row is an example. You need +% to perform the normalization separately for +% each feature. % % Hint: You might find the 'mean' and 'std' functions useful. -% - - - - +%