Hi All,
I am writing a simulation that examines the effects of species
extinctions on ecological communties by sequentially removing
individuals of a given species (sometimes using weighted probabilities)
and replacing the lost individuals with species identities randomly
sampled from the
I did not attempt to follow your code or discussion but you could
try these:
1. try to pin down what part of your code is taking the time
2. try to eliminate the loop, if possible
3. use matrices rather than data frames -- matrices are faster
Daniel E. Bunker deb37 at columbia.edu writes:
:
