[GitHub] spark pull request #16951: [SPARK-18285][SPARKR] SparkR approxQuantile suppo...

[yanboliang <gi...@git.apache.org>]

Github user yanboliang commented on a diff in the pull request:

    https://github.com/apache/spark/pull/16951#discussion_r101676617
  
    --- Diff: R/pkg/R/stats.R ---
    @@ -149,15 +149,18 @@ setMethod("freqItems", signature(x = "SparkDataFrame", cols = "character"),
     #' This method implements a variation of the Greenwald-Khanna algorithm (with some speed
     #' optimizations). The algorithm was first present in [[http://dx.doi.org/10.1145/375663.375670
     #' Space-efficient Online Computation of Quantile Summaries]] by Greenwald and Khanna.
    +#' Note that rows containing any NA values will be removed before calculation.
    --- End diff --
    
    Added test cases.


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