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Removing outliers for a matrix

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Kwasi Boateng
Kwasi Boateng on 3 Oct 2020
How can I remove outliers of a large matrix where an outlier is defined as a point more than three standard deviations from the mean of each column of the matrix.
I have this code but it works for a single vector, my data is in a matrix form
threshold = 3 * std( BQ);
validRange = mean(BQ) + [-1 1] * threshold;
dataWithoutOutliers = BQ(( data >= validRange(1) & data <= validRange(2) );

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Answers (1)

Sulaymon Eshkabilov
Sulaymon Eshkabilov on 3 Oct 2020
Use logical indexing.

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Kwasi Boateng
Kwasi Boateng on 3 Oct 2020
Please how do I go about it am new to matlab
Kwasi Boateng
Kwasi Boateng on 3 Oct 2020
I have this code but it works for a single vector, my data is in a matrix form
threshold = 3 * std( BQ);
validRange = mean(BQ) + [-1 1] * threshold;
dataWithoutOutliers = BQ(( data >= validRange(1) & data <= validRange(2) );
Sulaymon Eshkabilov
Sulaymon Eshkabilov on 3 Oct 2020
In this case, you had better employ MATLAB's builtin function to remove outliers. See this help doc:

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