For examples, subset 20k individuals in total from each tree and stem dataset (2012 release)

[maurolepore]

From https://github.com/forestgeo/forestr/issues/33

Not twenty individuals from each quadrat … subset to like 20K individuals … let them fall out spatially as they might … we don’t want to even out the spatial distribution.

--@seanmcmc

TASK

Subset the tags of a few trees at random. This will let the individuals fall out spatially as they might (we don’t want to even out the spatial distribution).

• Sean proposed using 20k individuals but for the most common use, in examples and tests, 20k seems too much. I'll start with 1000 individuals and may provide larger datasets (separately) if we really need that. In any case, the full datasets can be accessed via the bci package, and subseted as needed.

• Stuart and Sean suggested to use data from BCI released in 2016. but I'll start with the data released in 2012. The data released in 2012 is more clearly public via https://repository.si.edu/handle/10088/20925. And aiming to use the latest data for examples comes at a high maintainance cost. If we wanted examples to use always the latest available data, every time there is a new census all the code that uses those examples should be updtated. This seems unnecessary trouble.

[maurolepore]

Ask Suzanne

• Why are there negative tags?
• Can we discuss what is the most appropriate class of each variable? E.g.: Can tag and quadrat be integers instead of characer?

[maurolepore]

Continue at #13