From ff2ef97b6da7030a8512276938ded20a86d04a83 Mon Sep 17 00:00:00 2001 From: zhang Date: Sat, 29 Feb 2020 23:39:10 +0800 Subject: =?UTF-8?q?gini=E7=B3=BB=E6=95=B0=E8=AE=A1=E7=AE=97?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- stats/gini_index.py | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 stats/gini_index.py (limited to 'stats/gini_index.py') diff --git a/stats/gini_index.py b/stats/gini_index.py new file mode 100644 index 0000000..8821429 --- /dev/null +++ b/stats/gini_index.py @@ -0,0 +1,26 @@ +import numpy as np + + +def gini(x): + mean = np.mean(x) + mad = np.mean(np.abs(x - mean)) + rmad = mad/mean + return rmad/2 + + +if __name__ == '__main__': + + x = np.asarray([2, 2, 4, 4]) + print(gini(x)) + x = np.asarray([1, 1, 6, 4]) + print(gini(x)) + + x = np.random.rand(500) + print(gini(x)) + x = np.random.rand(500)+1 + print(gini(x)) + x = np.random.rand(500)+10 + print(gini(x)) + x = np.random.rand(500)+100 + print(gini(x)) + -- cgit v1.2.3