how to remove outliers of a data list

Question

farfar 2017-2-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/326202-how-to-remove-outliers-of-a-data-list

评论： farfar 2017-2-21

Hello everyone I have a set of data and I am trying to remove the outlires. I used to do it by excel with finding Q1,.. and then plot a box and find outliers, but I have a big set of data and no longer able to do that. does anyone know how I can remove outliers in matlab using quartiles? or any other statistical way of removing outliers ?

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Answer 1

Adam 2017-2-21

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https://ww2.mathworks.cn/matlabcentral/answers/326202-how-to-remove-outliers-of-a-data-list#answer_255738

在 MATLAB Online 中打开

doc prctile

if you have the Statistics toolbox.

If not it is easy enough to calculate percentiles in your own function. What you choose to do with them after that is up to you really, but with indexing you can easily use a percentile value to filter out values outside of a range.

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farfar 2017-2-21

Thank you Adam doc prctile brought up matlab help on how to calculate prctile, which was helpful but I still dont know how to remove outliers based on these prctile automatically?

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