[SPARK-14478][ML][MLLIB][DOC] Doc that StandardScaler uses the corrected sample std #12519
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jkbradley
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CC: @yanboliang What do you think? |
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Test build #56326 has finished for PR 12519 at commit
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@jkbradley An appropriate document is enough for now, this PR looks good to me. Thanks! |
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What changes were proposed in this pull request?
Currently, MLlib's StandardScaler scales columns using the corrected standard deviation (sqrt of unbiased variance). This matches what R's scale package does.
This PR documents this fact.
How was this patch tested?
doc only