Error in ConvertRawDataToRRIntervals

[amisepa]

I can successfully run ConvertRawDataToRRIntervals on most of my raw ECG files, but not on some, and I cannot figure out why. They don't different visually.

I get the following error:

The problem seems to come from run_sqrs that returns an empty sqrs_ann line 60 of ConvertRawDataToRRIntervals.

Desktop:

• Windows 10
• Matlab 2021b

[GiuliaDAP]

Dd you check if the ECG recordings for which you get the error message are very short or shorter than the window used for the analysis?
https://github.com/cliffordlab/PhysioNet-Cardiovascular-Signal-Toolbox/blob/master/InitializeHRVparams.m#L163

[amisepa]

Thank you. The files are ~120 s long so that's probably why.

I had HRVparams.windowlength set to the length (in s) of each file. Is it actually a sliding window that should be shorter than the file length? I did not set the HRVparams.sqi.windowlength parameter si I am guessing it is using default 10 s?

Thanks for the link, I did not see all these preprocessing parameters before. For the HRVparams.preprocess.method_outliers, would you recommend the 'pchip' or the 'curb' method to interpolate the outliers? I think some files have a lot of artifacts and end up being too short after rejection, leading to the error.