How to find points 3 std away from the mean in vector

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Olga 2014-9-9

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评论： Image Analyst 2020-8-19

采纳的回答： Image Analyst

Hello,

Could you please help me to find a way how to find the points which are 3 std away from the mean in vector?

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Image Analyst 2014-9-9

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编辑：Image Analyst 2014-9-9

在 MATLAB Online 中打开

Assuming you really mean " more than 3 standard deviations away from the mean"...

% Get the mean and standard deviation of the vector
theMean = mean(yourVector);
stdDev = std(yourVector);
% Get a logical vector of the locations where the value is more than 3 sd away from the mean.
locationsAwayFromMean = abs(yourVector - theMean) > stdDev;
% Extract only those elements
outlierValues = yourVector(locationsAwayFromMean);