add num_timepoints & num_docs_by_timepoint for DTModel

[bab2min]

The current tomotopy.DTModel is missing some features about the number of timepoints and documents. Suggest adding following properties into DTModel.

• num_timepoints (or t) : the value that is input as t of __init__
• num_docs_by_timepoint : the number of documents belonging to each timepoint

[ebergam]

Hi @bab2min , thanks a lot for this great work!

Are you planning to implement these features soon? It is quite crucial to be able to use the num_docs_by_timepoints parameter in order to be able to use your library.

This is another interesting resource you might be interested in https://github.com/GSukr/dtmvisual

thanks a lot!

[bab2min]

Hello @ebergam, thanks for your attention to my work!
Currently I'm implementing the next version of tomotopy, and it will include this enhancement. So please wait a few more days.

[ebergam]

Great, looking forward!
Thank you @bab2min :)