add change and tidy test

chris-simpson · Nov 16, 2024 · d6079df · d6079df
1 parent 4447a5c
commit d6079df
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diff --git a/astropy/stats/tests/test_sigma_clipping.py b/astropy/stats/tests/test_sigma_clipping.py
@@ -703,4 +703,4 @@ def test_propagation_of_mask():
     x = np.array([1, 1, 1, 1, 1, 1, 1, 1, 5, 5]).astype(float)
     y = np.ma.masked_where(x > 1, x)
 
-    np.testing.assert_allclose(sigma_clipped_stats(y, grow=1), (1, 1, 0))
+    assert_allclose(sigma_clipped_stats(y, grow=1), (1, 1, 0))
diff --git a/docs/changes/stats/17402.bugfix.rst b/docs/changes/stats/17402.bugfix.rst
@@ -0,0 +1,2 @@
+Fix an issue in sigma-clipping where the use of ``np.copy()`` was causing
+the input data mask to be discarded in cases where ``grow`` was set.