Compare two array values that meet criteria

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ALDO 2020-9-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/591856-compare-two-array-values-that-meet-criteria

评论： Adam Danz 2020-9-10

采纳的回答： Adam Danz

Hi

I have two arrays. I know that location of each array value.

the locations are as follows

location Array A= 1253 1982 50616 50665 61911 61999 62560 68112 68162 68376 73573 94747 99547 104436 104680 107002 .... (213 elements)

location Array B=1240 1953 4498 47993 51165 52541 52709 53983 54187 59203 59618 59829 61134 62035 64844 72766 72887 ....(130 elements)

what i would like to know is location value in A matchs B +-15

for example take the first value in A (1253) compare it to all the values in B if you find a value in B that is within the range (1253-15):(1253+15) take both location values and put it in an array (n,2). colum 1 value of A, column 2 value of B.

Thanks you for your help!

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Answer 1

Adam Danz 2020-9-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/591856-compare-two-array-values-that-meet-criteria#answer_492805

编辑：Adam Danz 2020-9-10

在 MATLAB Online 中打开

Your example only contains 1 close-match of values between A and B that are +/- 15 units apart.

% Raw data; A and B can be any length and do not have equal matches.
A = [ 1253	1982	50616	50665	61911	61999	62560	68112	68162	68376	73573	94747	99547	104436	104680	107002];
B = [1240	1953	4498	47993	51165	52541	52709	53983	54187	59203	59618	59829	61134	62035	64844	72766	72887];
% Distance matrix
% d(i,j) is the distance between A(i) and B(j)
d = abs(A(:) - B(:).'); 
% Find close-matches
[Aidx, Bidx] = find(d<=15); 
% Produce outputs
% z is nx2 containing the n close-match values from A and B
% zIdx is nx2 containing the indices of A and B that were matched
%   so, [A(zIdx(i,1)), B(zIdx(i,2))] == z(i,:)
z = [A(Aidx); B(Bidx)]'; 
zIdx = [Aidx, Bidx];