From 77f1e787fc6740d6e00873523823d50262fcaae5 Mon Sep 17 00:00:00 2001
From: Marco Biasini <mvbiasini@gmail.com>
Date: Mon, 13 Aug 2012 09:19:59 +0200
Subject: [PATCH] added paired T-test to table class
---
modules/base/pymod/table.py | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/modules/base/pymod/table.py b/modules/base/pymod/table.py
index cb505d3ae..11f8285d6 100644
--- a/modules/base/pymod/table.py
+++ b/modules/base/pymod/table.py
@@ -498,6 +498,27 @@ Statistics for column %(col)s
if not overwrite or not added:
self.rows.append(new_row)
+ def PairedTTest(self, col_a, col_b):
+ """
+ Two-sided test for the null-hypothesis that two related samples
+ have the same average (expected values)
+
+ :param col_a: First column
+ :param col_b: Second column
+
+ :returns: P-value between 0 and 1 that the two columns have the
+ same average. The smaller the value, the less related the two
+ columns are.
+ """
+ from scipy.stats import ttest_rel
+ xs = []
+ ys = []
+ for x, y in self.Zip(col_a, col_b):
+ if x!=None and y!=None:
+ xs.append(x)
+ ys.append(y)
+ result = ttest_rel(xs, ys)
+ return result[1]
def AddRow(self, data, overwrite=None):
"""
--
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