Github user brkyvz commented on a diff in the pull request:
https://github.com/apache/spark/pull/5858#discussion_r29557960
--- Diff: python/pyspark/sql/dataframe.py ---
@@ -875,6 +875,27 @@ def fillna(self, value, subset=None):
return DataFrame(self._jdf.na().fill(value,
self._jseq(subset)), self.sql_ctx)
+ def corr(self, col1, col2, method=None):
+ """
+ Calculates the correlation of two columns of a DataFrame as a
double value. Currently only
+ supports the Pearson Correlation Coefficient.
+ :func:`DataFrame.corr` and :func:`DataFrameStatFunctions.corr` are
aliases.
+
+ :param col1: The name of the first column
+ :param col2: The name of the second column
+ :param method: The correlation method. Currently only supports
"pearson"
+ """
+ if not isinstance(col1, str):
--- End diff --
If @rxin is okay with it, I can add those in a follow up PR for all the
methods that we added.
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