1 files changed, 33 insertions, 0 deletions
diff --git a/numpy/lib/tests/test_regression.py b/numpy/lib/tests/test_regression.py
new file mode 100644
index 000000000..2e0b3cfb0
--- /dev/null
+++ b/numpy/lib/tests/test_regression.py
@@ -0,0 +1,33 @@
+from numpy.testing import *
+
+set_local_path()
+import numpy as np
+restore_path()
+
+rlevel = 1
+
+class TestRegression(NumpyTestCase):
+    def test_polyfit_build(self,level=rlevel):
+        """Ticket #628"""
+        ref = [-1.06123820e-06, 5.70886914e-04, -1.13822012e-01,
+                9.95368241e+00, -3.14526520e+02]
+        x = [90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103,
+             104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115,
+             116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 129,
+             130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141,
+             146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157,
+             158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169,
+             170, 171, 172, 173, 174, 175, 176]
+        y = [9.0, 3.0, 7.0, 4.0, 4.0, 8.0, 6.0, 11.0, 9.0, 8.0, 11.0, 5.0,
+             6.0, 5.0, 9.0, 8.0, 6.0, 10.0, 6.0, 10.0, 7.0, 6.0, 6.0, 6.0,
+             13.0, 4.0, 9.0, 11.0, 4.0, 5.0, 8.0, 5.0, 7.0, 7.0, 6.0, 12.0,
+             7.0, 7.0, 9.0, 4.0, 12.0, 6.0, 6.0, 4.0, 3.0, 9.0, 8.0, 8.0,
+             6.0, 7.0, 9.0, 10.0, 6.0, 8.0, 4.0, 7.0, 7.0, 10.0, 8.0, 8.0,
+             6.0, 3.0, 8.0, 4.0, 5.0, 7.0, 8.0, 6.0, 6.0, 4.0, 12.0, 9.0,
+             8.0, 8.0, 8.0, 6.0, 7.0, 4.0, 4.0, 5.0, 7.0]
+        tested = np.polyfit(x, y, 4)
+        assert_array_almost_equal(ref, tested)
+
+        
+if __name__ == "__main__":
+    NumpyTest().run()