interval censoring

I am having trouble identifying what event code to give each of these
events in the interval censoring context

For interval censoring you need only the last day when you saw the bird
unfledged (or NA if never) and the first day you saw it fledged (or NA if
never).  The interval between these days is what you need.

So, if you saw a bird unfledged on days 1,3,10,11,15 and fledged on days
20,22,23,30 the interval is [15, 20]

	-thomas


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