MATLAB: Changing the image to logical or positive

logical matlab

??? Attempted to access im3(217,0); index must be a positive integer or logical.

Can anyone teach me how to change my im3 to logical?

Best Answer

You do not have to change the picture, but the index - as the error message explains. Indicies start at 1 in MATLAB, such that "im3(217, 0)" is not valid. I guess that "im3(218, 1)" solves your problem.

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x=x(x>0);

Look for "logical addressing" in documentation...

MATLAB: Index must be positive integer or logical

Note that...MATLAB indices are always positive integers.......the indices start from 1....you are trying to access a index with 0..this is not correct.

A = rand(10,1) ;   
A1 = A(1)   % this gives first element
A1 = A(0)   % this is wrong..throws error.

Best Answer

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MATLAB: Extracting positive numbers

MATLAB: Index must be positive integer or logical

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