CamDavidsonPilon/lifelines — pull request #107 by CamDavidsonPilon (2014-12-13 16:51:47+00:00)
Title: Fixing negative times

This address #105. There were two separate issues: one easy and one a little deeper.

1. In plotting, I assumed the min time was 0, this has been fixed.
2. I changed some logic in the core `survival_times_to_table` function that makes it more robust.

I've added tests for both fixes. @spacecowboy for review please :)