Units of frequency when using FFT in NumPy

Question

I am using the FFT function in NumPy to do some signal processing. I have array called signal which has one data point for each hour and has a total of 576 data poi

Answer 1

Result of fft transformation doesn't map to HOURS, but to frequencies contained in your dataset. It would be beneficial to have your transformed graph so we can see where the spikes are.

You might be having spike at the beginning of the transformed buffer, since you didn't do any windowing.