Pairwise comparison between four vectors

Question

nlm 2018-10-17

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/424624-pairwise-comparison-between-four-vectors

评论： nlm 2018-10-22

I have 2 pairs of values i.e., 4 vectors, where two vectors within pair have equal length. Vector 1 = [0,1,2,5,6,8], Vector 2=[0,3,4,5,6,7] and Vector 3 =[0,1,2,3,6,8,3,2,4,5,6,8], and Vector 4 =[0,3,4,5,6,7,8,3,5,6,7,8]. Now I want to do pairwise comparison. for example (0,0) and (1,3) in pair 1 is same as (0,0) and (1,3) in pair 2. I have vectors of size 30,000 and 17,000. Any suggestions ?

I tried to use ismember and &&, it doesn't work.

for ii = 1:length(nr1)

        if (nr == nr1(ii) || (nc ==nc1(ii)))
            k = 1;
        end 
end

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Jan 2018-10-18

编辑：Jan 2018-10-18

"It doesn't work" is a weak description of the problem. You do have the information already, so please share it with the readers.

" for example (0,0) and (1,3) in pair 1 is same as (0,0) and (1,3) in pair 2." - what does "is the same" mean exactly? Do only the values matter or even the position in the vectors? What do you want as output?

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Answer 1

Jan 2018-10-18

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/424624-pairwise-comparison-between-four-vectors#answer_341980

编辑：Jan 2018-10-18

在 MATLAB Online 中打开

Vector1 = [0,1,2,5,6,8]
Vector2 = [0,3,4,5,6,7]
Vector3 = [0,1,2,3,6,8,3,2,4,5,6,8]
Vector4 = [0,3,4,5,6,7,8,3,5,6,7,8]
A = [Vector1(:), Vector2(:)];
B = [Vector3(:), Vector4(:)];
Result = A(ismember(A, B, 'rows'), :)
 Result =
     0     0
     1     3
     2     4
     6     6
     8     7

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Jan 2018-10-19

I have no idea what "set of data (nc,nr,IMERGP1)" means. You have mentioned 4 vectors. "nc,nr,IMERGP1" and "nc1, nr1, SMAPP1" sounds like 6 variables. To understand "corresponding IMERGP1 and SMAPP1" it is required to define "corresponding" uniquely.

Does my answer solve the problem or do you need further assistance?

nlm 2018-10-22