Doubt about finding the nearest values between array and a matrix

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Paulo Cunha 2022-1-25

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评论： Paulo Cunha 2022-1-26

采纳的回答： Torsten

Hi, everybody

I'm trying to find the nearest values from a array inside a matrix. Example:

Array = [12, 16, 300, 200, 250, 380, 145, 6, 8, 10, 12, 100, 16, 440]; %array with 14 elements

Matrix = [15, 20, 310; 1000, 500, 1; 146, 10, 11; 5, 23, 800; 600, 100, 50]; %matrix 5x3

but when a try:

for i=1:size(Array,2)

[~,ID] = min(abs(Matrix - Array(i)),[],1);

end

The ID have just 3 elements, not 14. I don't understand why. Anybody could explain to me. please.

Att,

Paulo

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Torsten 2022-1-25

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for i=1:size(Array,2)

[r{i},c{i}] = find(abs(Matrix-Array(i))==min(abs(Matrix(:)-Array(i))));

end

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Paulo Cunha 2022-1-26

Man, you just destroyed the question! That was incredible!! Thank you very much!

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Jon 2022-1-25

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You are overwriting the value of ID with each pass through your loop, so you only see the value for the last pass.

If you want the value for every pass then you need to assign ID(i) in the loop

@DGM I gave those names, because the names I use in my original project could turn the problem too complex. My mother language is portuguese, and I use it to create the variables, and the project has almost 1000 lines.

Paulo Cunha 2022-1-26

@Jon thank you for the clarification! You helped me to solve the problem with your main answer. Thank you!!

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MATLAB Language Fundamentals Matrices and Arrays Creating and Concatenating Matrices

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