Symmetricity parameter is a boolean with the following effect:

• TRUE : generates a symmetric window, for use in filter design
• FALSE : generates a periodic window, for use in spectral analysis

The parameters for this window are as follows:

• Window Length ⇨ 51

int len = 51;
Poisson w1 = new Poisson(len); // For symmetric
double[] out = w1.getWindow();
Poisson w2 = new Poisson(len, false); // For asymmetric
double[] out = w2.getWindow();