| Clustering center | Numbers of the samples | Category | Accuracy of identification |
| Neuron 1 | P21, P22, P23, P24, P25, P26, P27, P28, P29, P30, and P31 | Third | 95% | Neuron 2 | P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, and P19 | First | Neuron 3 | P32, P33, P34, P35, P36, P37, P38, P39, and P40 | Fourth | Neuron 4 | P11, P12, P13, P14, P15, P16, P17, P18, and P20 | Second |
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