Removing outliers for a matrix

7 次查看（过去 30 天）
Kwasi Boateng
Kwasi Boateng 2020-10-3
评论： Sulaymon Eshkabilov 2020-10-3
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) );

请先登录，再回答此问题。

回答（1 个）

Sulaymon Eshkabilov
Use logical indexing.
  3 个评论
显示 1更早的评论
Kwasi Boateng
Kwasi Boateng 2020-10-3
编辑：Kwasi Boateng 2020-10-3
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 2020-10-3
In this case, you had better employ MATLAB's builtin function to remove outliers. See this help doc:
https://www.mathworks.com/help/matlab/ref/rmoutliers.html

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Image Thresholding 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by