Cluster analysis
| Cluster | HAC, pA | TOC, pA | TauCP2 | Tau CP3 | AT, mV | n | Cell Size |
|---|---|---|---|---|---|---|---|
| 1 | −3.2 | 19.7 | 22.3 | −3.3 | n/a | 32 | Small |
| 2 | −1.9 | 530.3 | 100.6 | −1.3 | n/a | 24 | Small |
| 3 | −35.7 | −37.7 | 72.0 | 0.9 | n/a | 31 | Very small |
| 4 | −590.4 | −310.9 | 3.8 | 0.9 | −20.0 | 24 | Medium |
| 5 | −102.7 | −33.9 | 9.0 | −2.0 | 0.0 | 13 | Medium |
| 6 | −126.9 | −22.7 | 3.5 | −2.1 | −37.1 | 7 | Medium |
| 7 | −36.0 | −9.8 | 115.1 | −1.8 | n/a | 10 | Very small |
| 8 | −75.1 | −20.7 | 7.8 | −2.2 | −20.0 | 7 | Medium |
| 9 | 2.6 | 8.7 | 4.5 | 2.7 | −20.0 | 5 | Medium |
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Cluster means for 5 cluster variates. The mean values for the 5 cluster variates are shown for each cell cluster. Separate cluster solutions were obtained for very small-, small-, and medium-sized cells. For clusters 1 and 2, only TOC and tau CP2 were needed; for clusters 3 and 7, only HAC and tau CP3 were required; for clusters 4, 5, 6, 8, and 9, all 5 variates were used to achieve a good cluster solution. Derivation of HAC, TOC, tauCP2, tau CP3, and AT are presented in Fig. 1. Cubic cluster criterion scores above 2 are considered good solutions (Hair et al. 1998). Cubic Clustering Criterion: very small, 3.45; small, 6.63; medium 21.30. HAC, hyperpolarization-activated current; TOC, transient outward current;CP2 and CP3, classification protocols 2 and3; AT, activation threshold.