Bulk Operation

SPARK-9315 Add support for head on DataFrame Column

SPARK-9315 Add parameter drop to subsetting operator [

SPARK-9315 Add 'with' API

SPARK-9315 SparkR: Documentation change for merge function

SPARK-9315 Improve R context management story and add getOrCreate

SPARK-9315 SparkR str() method on DataFrame objects

SPARK-9315 SparkR: Add merge to DataFrame

SPARK-9315 Add attach() function for DataFrame

SPARK-9315 Simplify SQLContext method signatures and use a singleton

SPARK-9315 Add as.DataFrame as a synonym for createDataFrame

SPARK-9315 Method coltypes() to return the R column types of a DataFrame

SPARK-9315 SparkR: Add correlation function to dataframe

SPARK-9315 SparkR: Add sort function to dataframe

SPARK-9315 DataFrame show method - show(df) should show first N number of rows, similar to R

SPARK-9315 Add transform and subset to DataFrame

SPARK-9315 Support `collect` on DataFrame columns

SPARK-9315 Add `unique` as a synonym for `distinct`

SPARK-9315 Add rbind as a synonym for `unionAll`

SPARK-9315 Add nrow, ncol, dim for SparkR data frames

SPARK-9315 Add `summary` as a synonym for `describe`

SPARK-9315 Add support for setting column names, types

SPARK-9315 Add `merge` as synonym for join

SPARK-9315 Add support for filtering using `[` (synonym for filter / select)