Apply applies the window windowFunction to x.

Bartlett returns an L-point Bartlett window.

Blackman returns an L-point Blackman window Reference: http://www.mathworks.com/help/signal/ref/blackman.html.

FlatTop returns an L-point flat top window.

Hamming returns an L-point symmetric Hamming window.

Hann returns an L-point Hann window.

Rectangular returns an L-point rectangular window (all values are 1).