Logical indexing returns different dimensions
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a = [3, 2]
b = [1; 1] == 1
a(b) % returns a 1x2 array
a = [3, 2; 4, 5]
b = [1; 1; 1; 1] == 1
a(b) % returns a 4x1 array
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Umesh Kumar Singla
2023-1-12
编辑：Umesh Kumar Singla
2023-1-12
采纳的回答
Vectors have different indexing behavior than matrices. There's nothing more to it, except perhaps to point out that it's not just logical indexing. It applies to regular indexing as well:
a=[10,20,30,40];
a([1;2])
a=[10,20;30 40];
a([1;2;3;4])
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