Table 1 Validation perplexities under the different numbers of topics
From: Modeling the public attitude towards organic foods: a big data and text mining approach
Number of topics | Validation perplexity | Number of topics | Validation perplexity | Number of topics | Validation perplexity |
|---|---|---|---|---|---|
1 | 290.5 | 6 | 247.9 | 11 | 244.2 |
2 | 269.1 | 7 | 241.1 | 12 | 256.9 |
3 | 276.4 | 8 | 237.5 | 13 | 251.9 |
4 | 253.7 | 9 | 239.4 | 14 | 270.7 |
5 | 245.6 | 10 | 243.3 | 15 | 267.2 |