ueshin commented on a change in pull request #33752:
URL: https://github.com/apache/spark/pull/33752#discussion_r700456001
##########
File path: python/pyspark/pandas/tests/test_series.py
##########
@@ -2905,6 +2905,21 @@ def test_combine_first(self):
self.assert_eq(psser1.combine_first(psser2),
pser1.combine_first(pser2))
+ def test_cov_of_series_in_same_frame(self):
+ pser = pd.DataFrame(
Review comment:
nit: shall we use `pdf` for pandas DataFrame?
##########
File path: python/pyspark/pandas/tests/test_series.py
##########
@@ -2905,6 +2905,21 @@ def test_combine_first(self):
self.assert_eq(psser1.combine_first(psser2),
pser1.combine_first(pser2))
+ def test_cov_of_series_in_same_frame(self):
+ pser = pd.DataFrame(
+ {
+ "s1": [0.90010907, 0.13484424, 0.62036035],
+ "s2": [0.12528585, 0.26962463, 0.51111198],
+ },
+ index=[0, 1, 2],
+ )
+
+ pcov = pser["s1"].cov(pser["s2"])
+
+ psser = ps.from_pandas(pser)
Review comment:
ditto: `psdf` for pandas-on-Spark DataFrame?
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