Compare Probability and Expectation

[minhson-kaist]

I have read your code and I have a question:

In item.go file, as I understand, you calculate the value of Expectation in the form of (tags/time) and the value of the probability in the range (0,1).

It leads to the negative value of KL score.

I wonder that we will compare each tag's KL, even we can have negative values of them?

[codesuki]

Re-reading the code now, the expectation is the maximum probability we had during the last week.
And the probability is how much % of all plays of this week we saw in the last n minutes.
Does that make sense?