`scipy.fftpack._pseudo_diffs:itilbert`

Signature

   def     itilbert (    x    ,    h    ,    period    =  None   ,    _cache    =  <_thread._local object at 0x0000>     )

Return inverse h-Tilbert transform of a periodic sequence x.

If x_j and y_j are Fourier coefficients of periodic functions x and y, respectively, then

y_j = -sqrt(-1)*tanh(j*h*2*pi/period) * x_j
y_0 = 0

For more details, see tilbert.