How to remove 5&95 percent outliers by column independently

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Mekala balaji
Mekala balaji 2017-9-20
回答： Walter Roberson 2017-9-20
Hi,
I have below data, and want to remove outliers by column independently,
vector:
0.2 2 5
1 4 6
2 0.3 17
2 4 9
40 5 36
3 0.3 54
I use the below function, but it can only be used for column array. How to use for the matrix?
percntiles = prctile(vector,[5 95])
outlierIndexes = vector < percntiles(1) | vector > percntiles(2);
outliers = vector(outlierIndexes)
nonOutliers = vector(~outlierIndexes)

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回答（1 个）

Walter Roberson
Walter Roberson 2017-9-20
Take the per column low percentile which gets you a row of values. Replicate into as many rows as the original. Compare to the original, getting out a logical matrix. Do the same with the high percentile, getting a second logical matrix. Or the two. Now use that as a mask to assign nan to those locations

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