Creating capture histories in R

​Do you do mark-recapture analyses? The required input data are "capture histories": binary strings to describe when animals (or plants) were found in a study. 

For example, a capture history of "101" describes a study where an individual was:

* caught on the first event, 
* not observed on the second event, and
* observed on the third event.

Data from mark-recapture and mark-resight studies are not usually recorded or stored in this format. Let's run through an exercise to reshape this data into capture histories!

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