Functions to run the Management Strategy Evaluation (closed-loop simulation) for a specified operating model
Simulate(OM = MSEtool::testOM, parallel = FALSE, silent = FALSE) Project( Hist = NULL, MPs = NA, parallel = FALSE, silent = FALSE, extended = FALSE, checkMPs = TRUE ) runMSE( OM = MSEtool::testOM, MPs = NA, Hist = FALSE, silent = FALSE, parallel = FALSE, extended = FALSE, checkMPs = TRUE )
An operating model object (class
Logical or a named list. Should MPs be run using parallel processing?
Should messages be printed out to the console?
Should model stop after historical simulations? Returns an object of class 'Hist' containing all historical data
A vector of methods (character string) of class MP
Logical. Return extended projection results?
Logical. Check if the specified MPs exist and can be run on
For most MPs, running in parallel can actually lead to an increase in computation time, due to the overhead in sending the
information over to the cores. Consequently, by default the MPs will not be run in parallel if
(although other internal code will be run in parallel mode).
To run MPs in parallel, specify a named list with the name of the MP(s) assigned as TRUE. For example,
will run the
AvC MP in parallel mode.
Additional savings in computation time can be achieved by running the entire simulation in batches. Individual simulations of the operating model
are divided into separate cores using SubCpars,
Project are applied independently for each core via
snowfall::sfClusterApplyLB, and the
output (a list of MSE objects) is stitched back together into a single MSE object using joinMSE.
The ideal number of cores will be determined based on the number of simulations and available cores.
There are several issues to look out for when using this split-apply-combine technique:
Numerical optimization for depletion may fail in individual cores when
OM@cpars$qs is not specified.
Length bins should be specified in the operating model in
OM@cpars$CAL_bins. Otherwise, length bins can vary by core and
create problems when combining into a single object.
Compared to non-parallel runs, sampled parameters in the operating model will vary despite the same value in
If there is an error in individual cores or while combining the parallel output into a single Hist or MSE object, the list of output (from the cores) will be returned.
Functions return objects of class Hist or MSE
Simulate - An object of class Hist
Project - An object of class MSE
runMSE - An object of class MSE if
Hist = TRUE otherwise a class Hist object
Simulate(): Run the Historical Simulations from an object of class
Project(): Run the Forward Projections
runMSE(): Run the Historical Simulations and Forward Projections
from an object of class 'OM
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