title: Polynomial regression in spark/ or external packages for spark
body: <p>After investing good amount of  searching on net for this topic, I am ending up here if I can get some pointer . please read further</p>
  
  <p>After analyzing Spark 2.0 I concluded polynomial regression is not possible with spark (spark alone), so is there some extension to spark which can be used for polynomial regression?
  - Rspark it could be done (but looking for better alternative)
  - RFormula in spark does prediction but coefficients are not available (which is my main requirement as I primarily interested in coefficient values)</p>