Table 2.

Performed external validating measures of spectral clustering on the labeled ground truth data DB1

(a) Performance using $\mathit{\Xi }$
Acc.	Spec.	Sens.
47.55	93.47	84.31
	53.34	76.00
	85.05	11.48
	100.0	1.88

(b) Performance using ${\mathit{\Xi }}^{\ast }$
Acc.	Spec.	Sens.
77.62	98.91	71.24
	85.87	78.66
	88.61	84.45
	97.07	75.47

(c) Confusion matrix using ${\mathit{\Xi }}^{\ast }$
	$\#0$	$\#1$	$\#2$	$\#3$
$\#0$	113	36	1	3
$\#1$	1	66	8	0
$\#2$	0	18	115	15
$\#3$	0	0	14	39

(d) Accuracy of different sets
Morphology-based	Non-linear	Raw waveform
69.46 %	70.86 %	36.6 %