Merge pull request #10011 from matplotlib/auto-backport-of-pr-10004

dstansby · web-flow · commit 61085a0bddc6 · 2017-12-15T19:50:35.000Z
Backport PR #10004 on branch v2.1.x
diff --git a/lib/matplotlib/mlab.py b/lib/matplotlib/mlab.py
@@ -1344,7 +1344,7 @@ def cohere(x, y, NFFT=256, Fs=2, detrend=detrend_none, window=window_hanning,
                  scale_by_freq)
     Pxy, f = csd(x, y, NFFT, Fs, detrend, window, noverlap, pad_to, sides,
                  scale_by_freq)
-    Cxy = np.abs(Pxy) ** 2 / (Pxx * Pxy)
+    Cxy = np.abs(Pxy) ** 2 / (Pxx * Pyy)
     return Cxy, f
 
 
