Forum: help

RE: empatica E4 IBI.csv [ Reply ] By: Arturo J. Mendez on 2020-12-16 12:24	[forum:48558]
These watches have the possibility of periodically checking heart rate, instead of continuous mode, but I never use this empatica E4 watch.

RE: empatica E4 IBI.csv [ Reply ] By: Guillaume Chaumet on 2020-12-16 11:54	[forum:48557]
Thank you for your quick answer. Other recordings are less weird however huge gaps are common. I will investigate those gaps. Thanks again

RE: empatica E4 IBI.csv [ Reply ]
By: Abraham Otero on 2020-12-16 10:52

[forum:48556]

It seems that the first column of the file is the time of occurrence of the beat, which is precisely the format that RHRV loads when it imports beats in ASCII format (see for example this example file http://rhrv.r-forge.r-project.org/tutorial/example.beats).

However, the record you attach is very rare. It seems to contain huge gaps in the record of the distances between beats. Ignoring the first line that looks like a header, it begins to register in the second 23, 24, 24, and then juspms to the 172 s, recodrs, a couple of beats, jmps to 179 s, 2 beats are recorded and skipps up to 345 s, then 530 s , then 735 s...

1521621755.000000, IBI
23.782339,0.453146
24.297987,0.515649
24.798010,0.500023
172.132879,0.406269
172.461019,0.328140
179.226954,0.468771
179.695725,0.468771
345.531441,0.453146
530.868050,0.437520

Apart from this, the heart rate in the record appears to be very high. Between 120 and 180 beats per minute.

I would check how exactly you got this record. It appears that recording is continually being stopped, and there are very large gaps between beats. I would also check if the heart rate was really that high.

empatica E4 IBI.csv [ Reply ]
By: Guillaume Chaumet on 2020-12-16 10:28

[forum:48555]

IBI.csv (13) downloads

Hi RHRV team,
Empatica E4 watch produces IBI.csv described by Empatica:

IBI.csv
Time between individuals heart beats extracted from the BVP signal.
No sample rate is needed for this file.
The first column is the time (respect to the initial time) of the detected inter-beat interval expressed in seconds (s).
The second column is the duration in seconds (s) of the detected inter-beat interval (i.e., the distance in seconds from the previous beat).

IBI could be used to produce RR with Kubios according to empatica docs.
I try to use RHRV to produce RR but time interval between IBI could be rather large (48 seconds in the first lines of the IBI attach file).
Do you have any experience with empatica data ?
Regards