MATLAB: About isinteger command(confusion)

isinteger

Hi, by the command of isinteger I can check if it is an integer, however, when defined at first, Matlab assume it is double precision right? So even a=3, isinteger(a) returns 0.
How to solve this problem?

Best Answer

Matlab represents integers in differnt ways:
  • int8, int16, etc. see Christians answer
  • with a special use of double, which is called flint. See Floating Points
I use this function to test for flint
    function    isf = isflint( m )
    %   floating double only
        try
            bitand( abs( m ), 1 );
            isf = true;
        catch me
            isf = false;
        end
    end
I picked up the idea from a contribution by the "Pedestrian" in the FEX.
(I stripped off comments and error handling.)
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