title: Calculating optimal number of topics for topic modeling (LDA)
body: <p>I am going to do topic modeling via LDA. I run my commands to see the optimal number of topics. The output was as follows:  It is a bit different from any other plots that I have ever seen. Do you think it is okay? or it is better to use other algorithms rather than LDA. It is worth mentioning that when I run my commands to visualize the topics-keywords for 10 topics, the plot shows 2 main topics and the others had almost a strong overlap. Is there any valid range for coherence?</p>
  <p>Many thanks to share your comments as I am a beginner in topic modeling.</p>
  <p><a href="https://i.stack.imgur.com/nNoJz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nNoJz.png" alt="enter image description here" /></a></p>