phase

Extracting annual amplitude and phase of xarray dataset for each pixel using xarray.DataArray.curvefit Question: I was wondering how can I extract annual amplitude and phase of xarray time series using xarray.DataArray.curvefit. We fit a 1d function in time to return annual and seasonal amplitude and phase with dims (x, y) We can use formula similar …

How to add a phase shift to a sin wave in the frequency domain with fft? Question: I want to shift a sine wave in the frequency domain My idea is the following: Fourier-Transform Add a phase shift of pi in frequency domain Inverse-Fourier-Transform In code: t=np.arange(0, 6 , 0.001) values = A*np.sin(t) ft_values= np.fft.fft(values) …