# Nov 8 - Nov 15

## Principal Components

Supposing we now have $$N$$ hashtag point processes. Here we present analysis based on the daily count process.

We denote the daily counts for hashtag $$i$$ as $$x_i(t)$$, where $$t$$ takes integer values in $$[t_{\min}, t_{\max}]$$. In our data, we have the year-long time window of 2012.

In the following, we show the daily counts with aligned time axis for a few top-trending hashtags.