spectral.py user warning about heartrate_analysis_python

[paulvangentcom]

Hi Simon,

Yes I saw that pop up from time to time. I'll look into exactly what's causing it. It's probably coming from the FFT or Periodogram computations in Scipy.

Your analysis should still finish normally, right?

• Paul

[sedurCode]

Hi Paul,
Output of your tool looks sensible for all the segments I have looked at using the visualisations exported using the plot_segment tool. However, I haven't attempted to prod the code further to see if I get the correct output behaviour.

Would be nice to use power-of-2 sized arrays for spectral analysis by default though! Great tool by the way, lets see if you do a much better job that the thing packaged with the shimmer matlab tools I have been using.

[paulvangentcom]

If the warning has any effect on output measures (I don't suspect it has), it should only be on frequency domain measures. HR and HRV measures are unaffected.

Thanks, I started developing this because I couldn't find a good open source toolkit myself : ). If you are missing some functionality feel free to let me know.

[paulvangentcom]

The spectral warning resulted from me setting an incorrect window size for Welch's method in the frequency spectrum computation. It is fixed in a6c4732

You now get the PSD back as a power of two array as requested. This is common practice so making it the default option makes sense. See e1dc543