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function [w] = blackmannuttall (m, opt)
//This function returns the filter coefficients of a Blackman-Nuttall window.
//Calling Sequence
//w = blackmannuttall (m)
//w = blackmannuttall (m, opt)
//Parameters
//m: positive integer value
//opt: string value, takes "periodic" or "symmetric"
//w: output variable, vector of real numbers
//Description.
//This is an Octave function.
//This function returns the filter coefficients of a Blackman-Nuttall window of length m supplied as input, to the output vector w.
//The second parameter can take the values "periodic" or "symmetric", depending on which the corresponding form of window is returned. The default is symmetric.
//Examples
//blackmannuttall(5,"symmetric")
//ans =
// 0.0003628
// 0.2269824
// 1.
// 0.2269824
// 0.0003628
rhs = argn(2)
if (rhs<1 | rhs>2)
error("Wrong number of input arguments.")
end
select (rhs)
case 1 then
w = callOctave("blackmannuttall",m)
case 2 then
w = callOctave("blackmannuttall",m,opt)
end
endfunction
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