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2011 Jul 12
2
MC-Simulation with foreach: Some cores finish early
Dear R-Users,
I run a MC-Simulation using the the packages "foreach" and "doMC" on a
PowerMac with 24 cores. There are roughly a hundred parametersets and I
parallelized the program in a way, that each core computes one of these
parametersets completely.
The problem ist, that some parametersets take a lot longer to compute than
others. After a while there are only a quarter of the cores still computing
(their first parameterset), while others a...
2006 Sep 20
4
Calculating mean together with split
..., and run
from 1 to 5.
I would like to calculate the mean of DensPlants for each simulation and
each year seperately, i.e. calculating the mean for all combinations of
sim and year over run.
I can use
split(npl, npl$sim)
to split npl into different groups each containing the entries for one
parameterset - but where to go from there?
Rainer
--
Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
Biology (UCT)
Department of Conservation Ecology and Entomology
University of Stellenbosch
Matieland 7602
South Africa
Tel: +27 - (0)72 808 2975 (w)
Fax: +27 - (0)21 808 3304
Cell: +27 - (0)83 94...