Displaying 1 result from an estimated 1 matches for "traitdf".
2005 Feb 03
1
Efficient selection and alteration of dataframe records
...weighted probabilities)
and replacing the lost individuals with species identities randomly
sampled from the remaining individuals. Thus I use two dataframes. One
contains all the individuals and their species identities (plotdf). The
other contains each species and their associated weights (traitdf).
While I have code that works, it runs slowly. I suspect there is a more
efficient way.
First, I 'sample' one species from the species file (traitdf), then I
use that result to 'subset' the individuals dataframe (plotdf) into two
new files: individuals of the extincted specie...