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function y = hanning(m, varargin)
//Return the filter coefficients of a Hanning window of length M
//Calling Sequence
//hanning (M)
//hanning (M, "periodic")
//hanning (M, "symmetric")
//Parameters
//M: real scalar, which will be the length of hanning window
//Description
//Return the filter coefficients of a Hanning window of length M.
//If the optional argument "periodic" is given, the periodic form of the window is returned. This is equivalent to the window of length M+1 with the last coefficient removed. The optional argument "symmetric" is equivalent to not specifying a second argument.
funcprot(0);
rhs= argn(2);
if(rhs <1 | rhs>2)
error("Wrong number of Input parameters");
end
select(rhs)
case 1 then
y= callOctave("hanning", m);
case 2 then
y= callOctave("hanning", m , varargin(1));
end
endfunction
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