Return row and col of ismembertol comparisons?

Question

Andrew Poissant 2017-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/355073-return-row-and-col-of-ismembertol-comparisons

编辑： Andrew Poissant 2017-9-4

I have a layered matrix, N, that is 834x834x3 and I want to scan that matrix using ismembertol to see which ordered pairs from F are in N and then return the row and col for each match. Matrix F is 93x2. I have my attempt at it below but it does not work properly and I do not think find is the function I need. I did not define the matrices N and F because they are defined using previous code. I know I need to use something like ismembertol(...) & ismembertol(...) to scan matrix N for common values between it and F but I am not sure how to return the row and col. Any suggestions?

[r, c] = size(F);
tol = 1;
for i = 1:r
    [row(i), col(i)] = find(ismembertol(F(i,1), N(:,:,2), tol) & ismembertol(F(i,2), N(:,:,3), tol))
end

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Answer 1

KSSV 2017-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/355073-return-row-and-col-of-ismembertol-comparisons#answer_280190

在 MATLAB Online 中打开

A = rand(3,3,3) ;
B = rand(2,2,3) ;
%%find values equal to 0.5 
[LIA,LocAllB] = ismembertol(B, A, 0.1)

LIA returns an array containing logical 1 (true) where the elements of B are within tolerance 0.1 of the elements in A.

LocB contains the index location in A for each element in B that is a member of A.

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KSSV 2017-9-4

Yes....that's what LIA and LOCB gives you...

Andrew Poissant 2017-9-4

编辑：Andrew Poissant 2017-9-4

I am confused. I have the matrix F that is being used for ismembertol versus two layers of matrix N. I do not see where the matrix F (not layered) is set up and compared to to the two different layers of N. I see that you set up two 3 layered matrices and compared the two but I am comparing one column of matrix F to second layer of N and the second column of F to the third layer of N. Am I missing something in your solution?

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