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By the way, @svtorykh,
one of the next updates will have more performance measures for LDA. Just need to find time to implement it. LLH by itself is always tricky, because it naturally falls down for more topics.
BR,
Martin
Hey @jozeftomas_2020,
i am fairly confused. KMeans and LDA are fairly different models. Why and how do you want to mix them?
~Martin
i've added Perplexity as the default to the performance of LDA. Perplexity is defined as
exp(-LLH/tokens)
and should be minimized. That's somewhat what you see in common blog posts on LDA.
It's not yet on the marketplace. Let's see when we have enough features to publish.
Cheers,
Martin
@svtorykh
May I ask how you generated the evaluation plot? Is there a specific operator for that or plotted it outside of RapidMiner?
Thanks!
/Aya
May I ask how you generated the evaluation plot? Is there a specific operator for that or plotted it outside of RapidMiner?
Thanks!
/Aya
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Hi,
it's the negative LLH. The lower the better.
BR,
Martin