jerryzhong / lda Goto Github PK

Hi，there(紧急，如果你是**学生的话，尽量中文交流，感谢)
First of all, also thank you for the code for test perplexity calculation extending the GibbsLDA++.
I would know two things below,hope you could help me out：

1. What does this "MakeFile" File mean?I mean is it command that write for cmd.exe
2. Is there any docs that i can read to know your code,cuz its hard for me to understand how it works and what these paramaters mean.
   I will appreciate it if u answer my question as soon as possible!

Hi,
First of all, thank you for the code for test perplexity calculation extending the GibbsLDA++. It will be very useful for my work.
I am observing the calculation of perplexity and it seems that you are applying the logarithm before the sum of all words probabilities in the document. Since the sum of logs is not equivalent the the log of sum, and the perplexity function takes into account the log of sum, your calculation may be incorrect.
Is my observation relevant?
Cheers,
Marcelo Pita