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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2022/09/16 07:37:44 UTC
[GitHub] [spark] zhengruifeng opened a new pull request, #37913: [SPARK-40447][PS] Implement `kendall` correlation in `DataFrame.corr`
zhengruifeng opened a new pull request, #37913:
URL: https://github.com/apache/spark/pull/37913
### What changes were proposed in this pull request?
Implement `kendall` correlation in `DataFrame.corr`
### Why are the changes needed?
for API coverage
### Does this PR introduce _any_ user-facing change?
yes, new correlation option:
```
In [1]: import pyspark.pandas as ps
In [2]: df = ps.DataFrame([(.2, .3), (.0, .6), (.6, .0), (.2, .1)], columns=['dogs', 'cats'])
In [3]: df.corr('kendall')
dogs cats
dogs 1.000000 -0.912871
cats -0.912871 1.000000
In [4]: df.to_pandas().corr('kendall')
/Users/ruifeng.zheng/Dev/spark/python/pyspark/pandas/utils.py:975: PandasAPIOnSparkAdviceWarning: `to_pandas` loads all data into the driver's memory. It should only be used if the resulting pandas DataFrame is expected to be small.
warnings.warn(message, PandasAPIOnSparkAdviceWarning)
Out[4]:
dogs cats
dogs 1.000000 -0.912871
cats -0.912871 1.000000
```
### How was this patch tested?
added UT
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[GitHub] [spark] zhengruifeng commented on pull request #37913: [SPARK-40447][PS] Implement `kendall` correlation in `DataFrame.corr`
Posted by GitBox <gi...@apache.org>.
zhengruifeng commented on PR #37913:
URL: https://github.com/apache/spark/pull/37913#issuecomment-1249935182
Merged into master, thank you @HyukjinKwon
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[GitHub] [spark] zhengruifeng closed pull request #37913: [SPARK-40447][PS] Implement `kendall` correlation in `DataFrame.corr`
Posted by GitBox <gi...@apache.org>.
zhengruifeng closed pull request #37913: [SPARK-40447][PS] Implement `kendall` correlation in `DataFrame.corr`
URL: https://github.com/apache/spark/pull/37913
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