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function w = flattopwin (m, opt)
//This function returns the filter coefficients of a Flat Top window.
//Calling Sequence
//w = flattopwin (m)
//w = flattopwin (m, opt)
//Parameters
//m: positive integer value
//opt: string value, takes in "periodic" or "symmetric"
//w: output variable, vector of real numbers
//Description
//This is an Octave function.
//This function returns the filter coefficients of a Flat Top 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.
//This window has low pass-band ripple but a high bandwidth.
//Examples
//flattopwin(8,"periodic")
//ans =
// 0.0009051
// - 0.0264124
// - 0.0555580
// 0.4435496
// 1.
// 0.4435496
// - 0.0555580
// - 0.0264124
funcprot(0);
rhs = argn(2)
if(rhs<1 | rhs>2)
error("Wrong number of input arguments.")
end
if(rhs==2)
if(opt~="periodic" & opt~="symmetric")
error("Window type should be periodic or symmetric.")
end
end
select(rhs)
case 1 then
w = callOctave("flattopwin",m)
case 2 then
w = callOctave("flattopwin",m,opt)
end
endfunction
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