output the the indices of values in an array less than 0.4 using both linear and subscript indexing in matlab

To output the indices of values in an array less than 0.4 using both linear and subscript indexing in MATLAB, you can follow these steps:

1. Create a sample array, let's call it array, for demonstration purposes:

main.m
array = [0.2, 0.5, 0.1, 0.8, 0.3];
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2. Using linear indexing:

• Find the indices of values less than 0.4 in the array using the find function:

main.m
indices_linear = find(array < 0.4);
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• This will give you a column vector of indices (indices_linear) where each index corresponds to the position of a value less than 0.4 in the array.

3. Using subscript indexing:

• Create a logical mask by comparing each element of the array with 0.4:

main.m
mask = array < 0.4;
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• Use the find function to get the indices of 'true' elements in the mask:

main.m
indices_subscript = find(mask);
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• This will give you a column vector of indices (indices_subscript) where each index corresponds to the position of a 'true' value in the mask.

To test the outputs, you can display the indices using the disp function:

main.m
disp(indices_linear);
disp(indices_subscript);
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Overall, the MATLAB code to output the indices of values less than 0.4 in an array using both linear and subscript indexing would be:

main.m
% Step 1: Creating a sample array
array = [0.2, 0.5, 0.1, 0.8, 0.3];

% Step 2: Using linear indexing
indices_linear = find(array < 0.4);

% Step 3: Using subscript indexing
mask = array < 0.4;
indices_subscript = find(mask);

% Displaying the indices
disp(indices_linear);
disp(indices_subscript);
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Please note that the example provided assumes a row vector 'array'. If you have a column vector, the results will remain the same as MATLAB treats column vectors as one-dimensional arrays.