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# scipy.fftpack.itilbert

`scipy.fftpack.``itilbert`(x, h, period=None, _cache={})

  itilbert(x, h, period=2*pi) -> y

  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

  Optional input: see tilbert.__doc__

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