How to do some calculations on nonzero nonNAN elements of an array

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Zeynab Mousavikhamene
评论： Tiago Dias 2019-12-3
I have an array of about 400*20 size and some of its members are NAN or zero. There is a second array of the same size which I need to divide the first array by corrsponding member of the second array: FirstArrayName./SecondArrayName
how can I exclude non zero non NAN elements from this calculation?
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KALYAN ACHARJYA
KALYAN ACHARJYA 2019-12-2
编辑：KALYAN ACHARJYA 2019-12-2
how can I exclude non zero non NAN elements from this calculation?
Are you want exclude zero or NaN or both?
There is no impact, if you divide directly without excluding the NaN and zero elements. NaN position reflects the NaN again and zero reflects the same zero, in addition you can suppress those elements in the result array also.

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Tiago Dias
Tiago Dias 2019-12-2
Hello, is this what u want to do?
A = [1 NaN 2 NaN;3 1 4 5]
result = A(1,:) ./ A(2,:)
result =
0.3333 NaN 0.5000 NaN
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Zeynab Mousavikhamene
Zeynab Mousavikhamene 2019-12-2
Hi Thanks. There TWO separate arrays witht the same number of colmuns and row. I need to dvide them like this: array1./array2 so each member of array1 is divided by corresponding member of array 2. I want to this division to be done for non zero and non-NAN members of array1.

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