Histogram2d is a Numpy function used in group two by two matrix based on certain bin conditions.
For Example
a=np.array([0.00, 1.00, 1.00, 0.98, 0.04, 0.85, 1.00, 1.00, 1.00, 0.36, 1.00,
1.00, 1.00, 0.00, 0.63, 1.00, 0.00, 0.15, 1.00])
b=np.array([0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1])
bins=np.array([0,0.5,1])
BINS : means from 0 - 0.4 is 0 and 0.5 to 1 is one
cm = np.histogram2d(a,b), bins=bins)[0]
array([[5.00, 1.00],
[1.00, 12.00]])
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