Hi Akshay,
It depends upon how the circles are calculated. If each circle
encloses all of the members of each group, yes. I doubt you would get
perfect separation in any real example, though. At the moment:
Hanukkah is finished,
Margashirsha Punima has just happened and
Christmas is coming up.
No matter how devout the adherents, I don't think you would find news
articles that only mentioned one of these festivals. Less facetious
groupings would suffer the same eclectic problem.

Jim

On Mon, Dec 20, 2021 at 6:29 PM akshay kulkarni <akshay...@hotmail.com> wrote:
>
> dear members,
>                          I am using LDA for topic modelling of news articles 
> (topicmodels package). I am visualizing the accuracy with the LDAvis package.
>
> The visualization shows clusters as circles, probably intersecting. My 
> question is, if a find the optimal number of topics, k, and if the circles 
> representing the topics doesn't intersect, then I have achieved perfect 
> segregation. AM I right?
>
> Thanking You,
> Yours sincerely,
> AKSHAY M KULKARNI
>
>         [[alternative HTML version deleted]]
>
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