Automate selecting the number of topics

[stijnh]

Currently, the topic modeling methods require the user to select the number of topics. It would be great if the optimal number of topics was selected automatically. For example, this paper looks interesting:

Zhao, W., Chen, J.J., Perkins, R. et al. A heuristic approach to determine an appropriate number of topics in topic modeling. BMC Bioinformatics 16, S8 (2015). https://doi.org/10.1186/1471-2105-16-S13-S8