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Finding same values in uneven arrays

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Jens Keijser
Jens Keijser 2018-5-9
评论： Jens Keijser 2018-5-9
Hello,
I need help with finding true positives. A have an array with all the moments a certain event occurs. And I have an array with all the moments my algorithm detected the event. The arrays are not even lengths. For example:
Array 1 (always the same length):
3 4 5 6 7 20 21 22 23 24 25 26
Array 2 (can vary in length):
1 2 3 5 6 23 24 28 29 30 102 160 171 189 190
So I want the number I of times the arrays share the same number. In this case that will be 5 times, which means there are 5 true positives.
Can someone help me with this?
Thankyou in advance!!

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sloppydisk
sloppydisk 2018-5-9
Use the ismember function.
A = [3 4 5 6 7 20 21 22 23 24 25 26];
B = [1 2 3 5 6 23 24 28 29 30 102 160 171 189 190];
positives = sum(ismember(A, B))

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