From 4217af0f38cc991d970fa987c46ed266191759d7 Mon Sep 17 00:00:00 2001 From: Thomas A Caswell Date: Mon, 18 Dec 2017 15:03:04 -0500 Subject: [PATCH] Backport PR #10019: TST: test mlab cohere --- lib/matplotlib/tests/test_mlab.py | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/lib/matplotlib/tests/test_mlab.py b/lib/matplotlib/tests/test_mlab.py index ef36eaf0b702..9ea18d67c281 100644 --- a/lib/matplotlib/tests/test_mlab.py +++ b/lib/matplotlib/tests/test_mlab.py @@ -2136,6 +2136,20 @@ def test_psd_windowarray_equal(self): assert_allclose(speca, specb, atol=1e-08) +# extra test for cohere... +def test_cohere(): + N = 1024 + np.random.seed(19680801) + x = np.random.randn(N) + # phase offset + y = np.roll(x, 20) + # high-freq roll-off + y = np.convolve(y, np.ones(20) / 20., mode='same') + cohsq, f = mlab.cohere(x, y, NFFT=256, Fs=2, noverlap=128) + assert_allclose(np.mean(cohsq), 0.837, atol=1.e-3) + assert np.isreal(np.mean(cohsq)) + + def test_griddata_linear(): # z is a linear function of x and y. def get_z(x, y): pFad - Phonifier reborn

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