Count occurances on multidimensional matrix with multiple criteia on different dimnesions

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Daniel
Daniel 2022-10-5
评论： Daniel 2022-10-5
I would like to count occurances of >= 90 on page 1 and = 2 on page 2 of a multidimensional matrix where both criteria in the same location need to be met to be true for the following:
A(:,:,1)=
[90 95 90 80
70 90 95 70
60 90 90 60]
A(:,:,2)=
[1 1 1
2 2 2
1 2 1]
The answer for the above example should be 3.
Thank you in advance for any assistance.

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回答（2 个）

Torsten
Torsten 2022-10-5
编辑：Torsten 2022-10-5
Ran in:
A = zeros(3,4,2);
A(:,:,1)=...
[90 95 90 80
70 90 95 70
60 90 90 60];
A(:,:,2)=...
[1 1 1 1
2 2 2 2
1 2 1 1];
occurences = nnz(A(:,:,1)>=90 & A(:,:,2)==2)
occurences = 3
Don't know why A(:,:,1) is 3x4 and A(:,:,2) is 3x3 though.
Davide Masiello
Davide Masiello 2022-10-5
Ran in:
A(:,:,1) = [ 90 95 90 80;...
70 90 95 70;...
60 90 90 60;...
];
A(:,:,2) = [ 1 1 1 1;...
2 2 2 2;...
1 2 1 1;...
];
B = (A(:,:,1) >= 90) + (A(:,:,2) == 2)
B = 3×4
1 1 1 0 1 2 2 1 0 2 1 0
N = sum(B==2,'all')
N = 3

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