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

Question

Zeynab Mousavikhamene 2019-12-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/494329-how-to-do-some-calculations-on-nonzero-nonnan-elements-of-an-array

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?

3 个评论
显示 1更早的评论隐藏 1更早的评论

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.

Zeynab Mousavikhamene 2019-12-2

@KALYAN ACHARJYA, @Stephan

For some reason, I need to divide the members that are nonzero and are not NAN.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Tiago Dias 2019-12-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/494329-how-to-do-some-calculations-on-nonzero-nonnan-elements-of-an-array#answer_404282

在 MATLAB Online 中打开

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

2 个评论
显示无隐藏无

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.

Tiago Dias 2019-12-3