mirt: mirtCluster – R documentation

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mirtCluster

Define a parallel cluster object to be used in internal functions

Description

This function defines a object that is placed in a relevant internal environment defined in mirt. Internal functions such as calcLogLik, fscores, etc, will utilize this object automatically to capitalize on parallel processing architecture. The object defined is a call from parallel::makeCluster(). Note that if you are defining other parallel objects (for simulation designs, for example) it is not recommended to define a mirtCluster.

Usage

mirtCluster(spec, omp_threads, remove = FALSE, ...)

Arguments

`spec`	input that is passed to `parallel::makeCluster()`. If no input is given the maximum number of available local cores will be used
`omp_threads`	number of OpenMP threads to use (currently applies to E-step computations only). Not used when argument input is missing
`remove`	logical; remove previously defined `mirtCluster()`?
`...`	additional arguments to pass to `parallel::makeCluster`

Author(s)

Phil Chalmers rphilip.chalmers@gmail.com

References

Chalmers, R., P. (2012). mirt: A Multidimensional Item Response Theory Package for the R Environment. Journal of Statistical Software, 48(6), 1-29. doi: 10.18637/jss.v048.i06

Examples

## Not run: 

#make 4 cores available for parallel computing
mirtCluster(4)

#stop and remove cores
mirtCluster(remove = TRUE)

# create 3 core achitecture in R, and 4 thread architecture with OpenMP
mirtCluster(spec = 3, omp_threads = 4)


## End(Not run)

mirt

Multidimensional Item Response Theory

v1.33.2

GPL (>= 3)

Authors

Phil Chalmers [aut, cre] (<https://orcid.org/0000-0001-5332-2810>), Joshua Pritikin [ctb], Alexander Robitzsch [ctb], Mateusz Zoltak [ctb], KwonHyun Kim [ctb], Carl F. Falk [ctb], Adam Meade [ctb], Lennart Schneider [ctb], David King [ctb], Chen-Wei Liu [ctb], Ogreden Oguzhan [ctb]

Initial release