Hi,

I have a data set with structure similar to this:
id    user    action
1      12      login
2      12      view
3      12      view
4      12      view
5      12      login
6      12      view
7      12      view
8      12      login

I want to create a list of sessions. That means to split table on every
occurrence of "login". Using Java (or some other language), I would
probably iterate through rows and create new List instance on every
"login", but I guess there is more efficient way to do that using R?

Thanks

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