ultrwin This function returns the coefficients of an Ultraspherical window. w = ultrwin (m, mu, par) w = ultrwin (m, mu, par, key) w = ultrwin (m, mu, par, key, norm) [w, xmu] = ultrwin (...) m: positive integer value mu: par: key: norm: This is an Octave function. This function returns the coefficients of an Ultraspherical window of length m supplied as input, to the output vector w. The second parameter controls the ratio between side lobe to side lobe of the window's Fourier transform. The third parameter controls the ratio between main lobe width to side lobe. The default value is beta. The value of xmu is also returned for given beta, att or latt.