[Scipy-svn] r4474 - trunk/scipy/stats/tests

[scipy-svn at scipy.org]

Author: cdavid
Date: 2008-06-24 05:52:35 -0500 (Tue, 24 Jun 2008)
New Revision: 4474

Modified:
   trunk/scipy/stats/tests/test_stats.py
Log:
Add test for #8.

Modified: trunk/scipy/stats/tests/test_stats.py
===================================================================
--- trunk/scipy/stats/tests/test_stats.py	2008-06-24 08:55:06 UTC (rev 4473)
+++ trunk/scipy/stats/tests/test_stats.py	2008-06-24 10:52:35 UTC (rev 4474)
@@ -482,6 +482,15 @@
         assert_almost_equal(intercept,0.0)
         assert_almost_equal(r,0.0)
 
+    def test_regress_simple(self):
+        """Regress a line with sinusoidal noise."""
+        x = numpy.linspace(0, 100, 100)
+        y = 0.2 * numpy.linspace(0, 100, 100) + 10
+        y += numpy.sin(numpy.linspace(0, 20, 100))
+
+        res = stats.linregress(x, y)
+        assert_almost_equal(res[4], 4.3609875083149268e-3)
+
 # Utility
 
 def compare_results(res,desired):