MATLAB: What determines the shape of a logically indexed array

logical indexingMATLABmatrix array

Matlab help explains: " Logical Indexing : … The output is always in the form of a column vector."
In practice, typing
a = ones(3,3);
b = a([true, true]);
gives a row vector b. Can someone tell me why does it behave this way? And is there any other instance (apart from indexing by one row logical vector) that gives a non-column result? Thanks, O.

Best Answer

Just to complete the story, the answer seems to be:
If B is a logical array and A is any array, then A(B) is equivalent (but faster) way to produce the same result as A(find(B)), including the shape of the output.
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