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Count number of times values in vector A are greater than corresponding values in vector B

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Ulrik Nash
Ulrik Nash 2011-6-27
评论： Martin Adams 2018-10-19
Hi Everyone,
Suppose I have two one-column vectors of equal column height, A and B.
For example
A = [1;2;3]
and
B = [2;0;4]
What statement will allow me to count the number of times values in vector A are greater than corresponding values in vector B. In this case, the answer is 1, because only 2 in A is greater than its corresponding value in B, namely 0.
Regards,
Ulrik.

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Sean de Wolski
Sean de Wolski 2011-6-27
n = sum(A>B);
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Martin Adams
Martin Adams 2018-10-19
Works great - and a simple solution too.
I used this to drastically speed up my for loop in which I was doing a logic test.
To speed up the process, I added values of the test to be a value inside of the matrix and then counted how many matrix entries were greater than 0.

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