Apr 2, 2020 · Mar 10, 2020 · Mar 10, 2020 · Mar 31, 2020 · Apr 1, 2020 · Apr 2, 2020
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
            Fc = 0  # same default as in mlab._spectral_helper()
        if noverlap is None:
            noverlap = 128  # same default as in mlab.specgram()
        if Fs is None:
            Fs = 2  # same default as in mlab._spectral_helper()

        if mode == 'complex':
            raise ValueError('Cannot plot a complex specgram')
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
                                scale="dB")


 def test_specgram_fs_none():
    """Test axes.specgram when Fs is None, should not throw error."""
    spec, freqs, t, im = plt.specgram(np.ones(300), Fs=None)
    xmin, xmax, freq0, freq1 = im.get_extent()
    assert xmin == 32 and xmax == 96


 @image_comparison(
    ["psd_freqs.png", "csd_freqs.png", "psd_noise.png", "csd_noise.png"],
    remove_text=True, tol=0.002)
Original file line number	Diff line number	Diff line change
Expand Up		@@ -7617,6 +7617,8 @@ def specgram(self, x, NFFT=None, Fs=None, Fc=None, detrend=None,
		Fc = 0 # same default as in mlab._spectral_helper()
		if noverlap is None:
		noverlap = 128 # same default as in mlab.specgram()
		if Fs is None:
		Fs = 2 # same default as in mlab._spectral_helper()

		if mode == 'complex':
		raise ValueError('Cannot plot a complex specgram')
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Original file line number	Diff line number	Diff line change
Expand Up		@@ -4166,6 +4166,13 @@ def test_specgram_angle():
		scale="dB")


		def test_specgram_fs_none():
		"""Test axes.specgram when Fs is None, should not throw error."""
		spec, freqs, t, im = plt.specgram(np.ones(300), Fs=None)
		xmin, xmax, freq0, freq1 = im.get_extent()
		assert xmin == 32 and xmax == 96


		@image_comparison(
		["psd_freqs.png", "csd_freqs.png", "psd_noise.png", "csd_noise.png"],
		remove_text=True, tol=0.002)
Expand Down