How to return the number of same elements on same index position when comparing two arrays

Question

I have two arrays:

array([2,3,4,4,1])

and

array([3,3,5,4,1])

I want to return the number of similar values at similar index positions. In this case this should be 3, is this possible with a single numpy operation? I know how to do it with a for loop but I rather not do this.

score 3 · Accepted Answer · answered Nov 13 '21 at 16:37

3

Use np.sum()

l1 = np.array([2, 3, 4, 4, 1])
l2 = np.array([3, 3, 5, 4, 1])

>>> np.sum(l1 == l2)
3

>> l1 == l2
array([False,  True, False,  True,  True])

answered Nov 13 '21 at 16:37

Corralien

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Thanks, exactly what I need! – Miles Bennet Dyson Nov 13 '21 at 16:39

How to return the number of same elements on same index position when comparing two arrays

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