reconnect moved files to git repo

venv/lib/python3.11/site-packages/statsmodels/tools/tests/test_catadd.py

@@ -0,0 +1,18 @@
+import numpy as np
+from numpy.testing import assert_equal
+from statsmodels.tools.catadd import add_indep
+
+from scipy import linalg
+
+def test_add_indep():
+    x1 = np.array([0,0,0,0,0,1,1,1,2,2,2])
+    x2 = np.array([0,0,0,0,0,1,1,1,1,1,1])
+    x0 = np.ones(len(x2))
+    x = np.column_stack([x0, x1[:,None]*np.arange(3), x2[:,None]*np.arange(2)])
+    varnames = ['const'] + ['var1_%d' %i for i in np.arange(3)] \
+                         + ['var2_%d' %i for i in np.arange(2)]
+    xo, vo = add_indep(x, varnames)
+
+    assert_equal(xo, np.column_stack((x0, x1, x2)))
+    assert_equal((linalg.svdvals(x) > 1e-12).sum(), 3)
+    assert_equal(vo, ['const', 'var1_1', 'var2_1'])