I need to filter out outliers from a dataframe by all columns. I can
manually list all columns like:
df.filter(x=>math.abs(x.get(0).toString().toDouble-means(0))<=3*stddevs(0))
.filter(x=>math.abs(x.get(1).toString().toDouble-means(1))<=3*stddevs(1
))
...
But I want to turn it into a general function which can handle variable
number of columns. How could I do that? Thanks in advance!
Regards,
Shawn
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