scipy.fftpack.
shift#
- scipy.fftpack.shift(x, a, period=None, _cache=<_thread._local object>)[source]#
- Shift periodic sequence x by a: y(u) = x(u+a). - If x_j and y_j are Fourier coefficients of periodic functions x and y, respectively, then: - y_j = exp(j*a*2*pi/period*sqrt(-1)) * x_f - Parameters:
- xarray_like
- The array to take the pseudo-derivative from. 
- afloat
- Defines the parameters of the sinh/sinh pseudo-differential 
- periodfloat, optional
- The period of the sequences x and y. Default period is - 2*pi.