Removing outliers for a matrix

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Kwasi Boateng
Kwasi Boateng 2020 年 10 月 3 日
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) );

回答 (1 件)

Sulaymon Eshkabilov
Sulaymon Eshkabilov 2020 年 10 月 3 日
Use logical indexing.
  3 件のコメント
Kwasi Boateng
Kwasi Boateng 2020 年 10 月 3 日
編集済み: Kwasi Boateng 2020 年 10 月 3 日
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 2020 年 10 月 3 日
In this case, you had better employ MATLAB's builtin function to remove outliers. See this help doc:

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