error when using 'find' function
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Hi
i actually want to find the first the first and last non zero row to avoid the edge effects and enforce them to zero for my analysis. But when i try running the code, i get this error - 'Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 0-by-1'. Here is the part of code that gives the error.
idxo1 = zeros(size(U_col,2),size(U_col,3));
idxo2 = zeros(size(U_col,2),size(U_col,3));
for j =1:size(U_col,3)-1
for k = 1:size(U_col,2)-1
idxo1(k,j) = find(EffectiveDivergence(:,k,j), 1, 'first');
idxo2(k,j) = find(EffectiveDivergence(:,k,j), 1, 'last');
end
end
5 and 6th line are giving the errors.
Thanks
采纳的回答
Rik
2020-5-27
0 个投票
If you store output of the find function to a temporary variable, you will notice that the error occurs when that temporary variable is empty.
If you can't guarantee a non-zero value can be found you need to think about a mitigation. Do you want to store a NaN? A zero?
4 个评论
Sunil S Hosakoti
2020-5-27
编辑：darova
2020-5-29
Yes, I want to enforce the first and last non-zero row to 'zero (0)' to remove the edge effects or the artifact. I have attached images in transition (1st image and 18th image) which will tell you about the edge effects i'm mentioning about. Thanks
Rik
2020-5-27
What is it exactly you want to remove? What do you want to measure? Those bright parts look much wider than a single pixel.
You could prevent the error in your original post with this line, but I doubt that will get you the result you want.
if ~any(EffectiveDivergence(:,k,j)),continue,end
Sunil S Hosakoti
2020-5-28
编辑：Sunil S Hosakoti
2020-5-29
Sunil S Hosakoti
2020-6-3
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