Yanbo Liang e7f9199e70 [SPARK-12903][SPARKR] Add covar_samp and covar_pop for SparkR ... Add ```covar_samp``` and ```covar_pop``` for SparkR. Should we also provide ```cov``` alias for ```covar_samp```? There is ```cov``` implementation at stats.R which masks ```stats::cov``` already, but may bring to breaking API change. cc sun-rui felixcheung shivaram Author: Yanbo Liang <ybliang8@gmail.com> Closes #10829 from yanboliang/spark-12903.		2016-01-26 19:29:47 -08:00
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testthat	[SPARK-12903][SPARKR] Add covar_samp and covar_pop for SparkR	2016-01-26 19:29:47 -08:00