removeoutliers.m.svn-base

来自「a function inside machine learning」· SVN-BASE 代码 · 共 14 行

function [X, y] = removeOutliers(X, y)
% A function to remove the outlier examples in X 
% we simple remove anything that is greater than mean + 2*std 


norms = sqrt(sum(X.^2, 2)); 
meanNorm = mean(norms); 
stdNorm = std(norms); 

outlierIndices = find(norms > (meanNorm+stdNorm*2));

X(outlierIndices, :) = []; 
y(outlierIndices) = [];