finding places where an array are equal to zero and replacing them accordingly

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Bran 2013-6-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/80304-finding-places-where-an-array-are-equal-to-zero-and-replacing-them-accordingly

I have written some code, however, due to the fact that my alogirthm is really quite complicated it is hard for me to see if my code is working

I Have a 16x16x16 array and I want to find the places where that array = zero;

I have done this in the following way ind = A == 0

I then want to create a new array which takes values from one array at the places where it is zero and values from another else where; Would this code do it?

                    ANEW(ind)=Adashup2new(i,j,k);
                    ANEW(~ind) = MAT(i,j,k);

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Lokesh Ravindranathan 2013-6-26

Could you provide an example of what you are attempting to do? I understand that you have found the indices where the values are zeros. Could you explain what the variables are, ANEW and Adashup2new w.r.t. A?

Bran 2013-6-26

So I want to create a new array called ANEW which has the same dimensions as A At the indices where A is zero I want it to instead take values from an array called Adashup2new and for all other indices I want it to take values from an array called MAT.

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Answer 1

Image Analyst 2013-6-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/80304-finding-places-where-an-array-are-equal-to-zero-and-replacing-them-accordingly#answer_90009

在 MATLAB Online 中打开

Try this:

% Initialize ANEW to MAT.
ANEW = MAT; 
% Find zero values;
zeroIndexes = A == 0;
% Replace ANEW values at zeroIndexes with values from Adashup2new
ANEW(zeroIndexes) = Adashup2new(zeroIndexes);

Adashup2new must be the same dimensions as A, ANEW, and MAT.