Explain the concept of a logical index in MATLAB.
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A logical index in MATLAB is a vector of logical values (true or false) that specifies which elements of a matrix or array to access or modify. You can use logical indices to selectively extract, modify, or filter data based on specific conditions.
array = [1 2 3 4 5];
logical_index = [true false true false true];
selected_elements = array(logical_index); % Extract elements based on the index
disp(selected_elements);