This is code to calculate the Cliff's Delta effect size metric, which strangely is not in NumPy/SciPy.stats.
@Timm had [this as a gist](https://gist.github.com/timm/a6e759eb7d9b5f05b468), and @mtorchiano has [R code with tests](https://github.com/mtorchiano/effsize). I have merged them. Well, Marco's code does a lot more. I merged his tests.
# cliffs_delta
**The Cliff's Delta** statistic is a non-parametric effect size measure that quantifies the amount of difference between two groups of observations beyond p-values interpretation. This measure can be understood as a useful complementary analysis for the corresponding hypothesis testing.
# Installation
This package can either be installed using pip or from a tarball using the standard Python distutils.
If you are installing using ```pip```, you don’t need to download anything as the latest version will be downloaded for you from PyPI:
```
pip install cliffs-delta
```
# Example & Usage
Import the method ```cliffs_delta``` from ```cliffs_delta```
```python
from cliffs_delta import cliffs_delta
x1 = [10, 20, 20, 20, 30, 30, 30, 40, 50, 100]
x2 = [10, 20, 30, 40, 40, 50]
d, res = cliffs_delta(x1, x2)
print(d,res)
-0.06666666666666667 negligible
```
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"description": "This is code to calculate the Cliff's Delta effect size metric, which strangely is not in NumPy/SciPy.stats.\n\n@Timm had [this as a gist](https://gist.github.com/timm/a6e759eb7d9b5f05b468), and @mtorchiano has [R code with tests](https://github.com/mtorchiano/effsize). I have merged them. Well, Marco's code does a lot more. I merged his tests.\n\n\n# cliffs_delta\n\n**The Cliff's Delta** statistic is a non-parametric effect size measure that quantifies the amount of difference between two groups of observations beyond p-values interpretation. This measure can be understood as a useful complementary analysis for the corresponding hypothesis testing.\n\n# Installation\n\nThis package can either be installed using pip or from a tarball using the standard Python distutils.\n\nIf you are installing using ```pip```, you don\u2019t need to download anything as the latest version will be downloaded for you from PyPI:\n\n```\npip install cliffs-delta\n```\n# Example & Usage\n\nImport the method ```cliffs_delta``` from ```cliffs_delta```\n\n```python\nfrom cliffs_delta import cliffs_delta\n\nx1 = [10, 20, 20, 20, 30, 30, 30, 40, 50, 100]\nx2 = [10, 20, 30, 40, 40, 50]\nd, res = cliffs_delta(x1, x2)\n\nprint(d,res)\n\n-0.06666666666666667 negligible\n```\n\n",
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