fourier_transform#

PySeismoSoil.helper_signal_processing.fourier_transform(signal_2_col: ndarray, *, real_val: bool = True, double_sided: bool = False, show_fig: bool = False) → ndarray[source]#

Fourier transform using FFT.

Parameters:

  • signal_2_col (np.ndarray) – Signal in two columns (time array and signal array).

  • real_val (bool) – Whether to return the amplitude (or “magnitude”) of the complex numbers.

  • double_sided (bool) – Whether to return the second half of the spectrum (i.e. beyond the Nyquist frequency).

  • show_fig (bool) – Whether to show figures of the spectrum.

Returns:

spectra – A two-column array containing [freq_array, spectrum].

Return type:

np.ndarray