mpi.gather.Robj {Rmpi}R Documentation

Extentions of MPI_Gather and MPI_Allgather APIs

Description

mpi.gather.Robj gathers each member's object to the member specified by the argument root. The root member receives the objects as a list. mpi.allgather.Robj is the same as mpi.gather.Robj except that all members receive the result instead of just the root.

Usage

mpi.gather.Robj(obj=NULL, root = 0, comm = 1)

mpi.allgather.Robj(obj=NULL, comm = 1)

Arguments

obj data to be gathered. Could be different type.
root rank of the gather
comm a communicator number

Value

For mpi.gather.Robj, it returns a list, the gathered message for the root member. For mpi.allgatherv.Robj, it returns a list, the gathered message for all members.

Author(s)

Hao Yu and Wei Xia

References

http://www.lam-mpi.org/, http://www-unix.mcs.anl.gov/mpi/www/www3/

See Also

mpi.gather, mpi.allgatherv.

Examples

## Not run: 
#Assume that there are some slaves running
mpi.bcast.cmd(id<-mpi.comm.rank())
mpi.bcast.cmd(x<-rnorm(id))
mpi.bcast.cmd(mpi.gather.Robj(x))
x<-"test mpi.gather.Robj"
mpi.gather.Robj(x)

mpi.bcast.cmd(obj<-rnorm(id+10))
mpi.bcast.cmd(nn<-mpi.allgather.Robj(obj))
obj<-rnorm(5)
mpi.allgather.Robj(obj)
mpi.remote.exec(nn)
## End(Not run)

[Package Rmpi version 0.5-5 Index]