Checking rows of array for one of a set of values

Question

Adam Fitchett 2022-3-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1662969-checking-rows-of-array-for-one-of-a-set-of-values

回答： Voss 2022-3-3

How can I concisely check if each row of a matrix contains one or more of a certain set of values? I want to do something like this:

myMatrix = [0,0,0;0,0,1;0,0,0;0,0,2;0,0,0;0,0,1;0,0,0;0,0,2]
checkFor = [1,2,3]
any(myMatrix==checkFor,2)
ans = [2;4;6;8]
myMatrix = 8×3
     0     0     0
     0     0     1
     0     0     0
     0     0     2
     0     0     0
     0     0     1
     0     0     0
     0     0     2
checkFor = 1×3
     1     2     3
ans = 8×1 logical array
   0
   0
   0
   0
   0
   0
   0
   0
ans = 4×1
     2
     4
     6
     8

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Answer 1

Voss 2022-3-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1662969-checking-rows-of-array-for-one-of-a-set-of-values#answer_909054

在 MATLAB Online 中打开

Use ismember():

myMatrix = [0,0,0;0,0,1;0,0,0;0,0,2;0,0,0;0,0,1;0,0,0;0,0,2];
checkFor = [1,2,3];
ism = any(ismember(myMatrix,checkFor),2);
find(ism)
ans = 4×1
     2
     4
     6
     8
ans = [2;4;6;8]
ans = 4×1
     2
     4
     6
     8