Windowing functions. Thses can be used to on complex buffers in order to improve the quality of the FFT, see http://en.wikipedia.org/wiki/Windowing_functions.
val cosine : Stdlib.Complex.t array-> unit
val hann : Stdlib.Complex.t array-> unit
val hamming : Stdlib.Complex.t array-> unit
val lanczos : Stdlib.Complex.t array-> unit
val triangular : Stdlib.Complex.t array-> unit
val bartlett_hann : Stdlib.Complex.t array-> unit
val blackman : ?alpha:float ->Stdlib.Complex.t array-> unit
val nuttall : Stdlib.Complex.t array-> unit
val blackman_harris : Stdlib.Complex.t array-> unit
val blackman_nuttall : Stdlib.Complex.t array-> unit