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I need to compare Two-step clustering with latent class analysis. As LCA is not possible in SPSS I did it in R, however, 2-step clustering in R is quite challenging, so I did it in SPSS. To compare it I need different measures including the values of log-likelihood. The question is can I obtain it somehow from the two-cluster analysis in SPSS?

Yauheniya Volchok
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  • See this answer which explains how BIC can be computed as a clustering criterion. It uses the same formula of the LL as the TwoStep cluster analysis in SPSS – ttnphns Jul 25 '20 at 20:28

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SPSS Statistics TWOSTEP CLUSTER will not directly output a log-likelihood, only AIC or BIC when doing automatic selection of the number of clusters, so you'd have to dig into the formulas in the algorithms in order to manually calculate it.

David Nichols
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