How to cluster 1D array so that approximately equal values are replaced by their average?

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Travis Briles 2021-4-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/796757-how-to-cluster-1d-array-so-that-approximately-equal-values-are-replaced-by-their-average

评论： Travis Briles 2021-4-9

I have a 1D array that features "double-counts". I would like to consolidate or cluster the dataset in a way that replaces the double-counts with the average of the two double-counted values. Here's a sample dataset

xx=[185.0712  185.0715  185.5117  186.1008  186.5077  187.1303  187.5037  188.1596  188.1597  188.4993  189.1890  189.4949  190.2185  190.4903  191.2477  191.2480].'

Here's a screenshot where I've circled the relevant entries that are double counts:

Does anyone know how to do this?

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采纳的回答

Walter Roberson 2021-4-9

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/796757-how-to-cluster-1d-array-so-that-approximately-equal-values-are-replaced-by-their-average#answer_670922

在 MATLAB Online 中打开

https://www.mathworks.com/help/matlab/ref/uniquetol.html

[~, ~, G] = uniquetol(xx);
xxmean = grpstats(xx, G, 'mean');

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Walter Roberson 2021-4-9

在 MATLAB Online 中打开

Statistics and Machine Learning Toolbox.

You can instead use

xx=[185.0712  185.0715  185.5117  186.1008  186.5077  187.1303  187.5037  188.1596  188.1597  188.4993  189.1890  189.4949  190.2185  190.4903  191.2477  191.2480].'
xx = 16×1
0712
0715
5117
1008
5077
1303
5037
1596
1597
4993
[~, ~, G] = uniquetol(xx, 1e-4);
xxmean = accumarray(G, xx, [], @mean)
xxmean = 13×1
0713
5117
1008
5077
1303
5037
1596
4993
1890
4949