Clarification of clean_asr user feedback

[sammy-w]

I am using the clean_asr function to reduce artifacts in offline continuous EEG (i.e., blinks and muscle activity).
Could someone please explain what this section of the clean_asr output means?
“Keeping 32.8% (86 seconds) of the data.”

It seems like it’s only keeping 30% of the original data, but visual inspection of the “cleaned” signal suggests that it’s keeping most of the original data while mostly removing blinks.
I have experimented with higher cutoff values (e.g., 20 or 25), but this percentage remains the same. Please find example output below.

EEG_clean = clean_asr(EEG, 10); %aggresive is 5, and conservative cutoff of 20

Determining time window rejection thresholds...done.
Keeping 32.8% (86 seconds) of the data.
eeg_insertbound(): 45 boundary (break) events added.
eeg_checkset note: upper time limit (xmax) adjusted so (xmax-xmin)*srate+1 = number of frames
Scaling components to RMS microvolt
Scaling components to RMS microvolt
Scaling components to RMS microvolt
Scaling components to RMS microvolt
Estimating calibration statistics; this may take a while...
Determining per-component thresholds...done.
Now cleaning data in 6 blocks......