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calculate median and inter quartile range on spark dataframe
I have a spark dataframe of 5 columns and I want to calculate median and interquartile range on all. I am not able to figure out how do I write udf and call them on columns.
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Here is the easiest way to calculate this... https://stackoverflow.com/questions/37032689/scala-first-quartile-third-quartile-and-iqr-from-spark-sqlcontext-dataframe No Hive or windowing necessary.
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