matching the element of matrix with an array

Question

Mausmi Verma 2021-11-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1598679-matching-the-element-of-matrix-with-an-array

评论： Mausmi Verma 2021-11-30

采纳的回答： Jan

Suppose i have an array as,

A={ [2,3;2,7] [3,2;3,4;3,8] [4,3;4,5] [5,4;5,10] [7,2;7,8;7,12] }

and a matrix as B=[17,8,14,4,18]

now i want to match the element from B with A and want answer as

C={ [ ] [3,4 ; 3,8] [4] [5,4] [7,8] }

plz help

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Mausmi Verma 2021-11-29

A is an cell array representing some routes, and B is a matrix representing the node may or may not exist in the routes. So if any node from B exists in the any of the routes given in A, then that route will be available and if not then that route doesnt exists and the final answer should be in the way given in C. I may not be good in framing my question in a proper way, so i apologise for that

Jan 2021-11-29

编辑：Jan 2021-11-29

A general hint: The cell array contains matrices, which consist of numbers. Explain problem in the terms Matlab can work with. "routes" and "nodes" are the meaning of the numbers, but this does not matter for Matlab, so it does not for solving the problem.

There is no need for apologies: It is a standard step in solving a problem to ask questions for clarifications. Your question about Matlab are welcome here.

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Answer 1

Jan 2021-11-29

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1598679-matching-the-element-of-matrix-with-an-array#answer_843219

在 MATLAB Online 中打开

A = {[2,3;2,7], [3,2;3,4;3,8], [4,3;4,5], [5,4;5,10], [7,2;7,8;7,12]};
B = [17,8,14,4,18]
B = 1×5
    17     8    14     4    18
C = cell(size(A));
for iA = 1:numel(A)
    a     = A{iA};
    match = any(ismember(a, B), 2);
    if any(match)
       C{iA} = a(match, :);
    end
end
celldisp(C)
 
C{1} =
 
     []
 
C{2} =
 
     3     4
     3     8

C{3} =
 
     4     3
     4     5

C{4} =
 
     5     4

C{5} =
 
     7     8

% C={ [ ]  [3,4 ; 3,8] [4] [5,4] [7,8] }