R: Distributed object to Matrix Converters

as.matrix {pbdDMAT}

R Documentation

Distributed object to Matrix Converters

Description

Converts a distributed matrix into a non-distributed matrix.

Usage

## S4 method for signature 'ddmatrix'
as.matrix(x, proc.dest = "all", attributes = TRUE)

Arguments

`x`	numeric distributed matrix
`proc.dest`	destination process for storing the matrix
`attributes`	logical, specifies whether or not the current attributes should be preserved.
`...`	Additional arguments.

Details

The proc.dest= argument accepts either the BLACS grid position or the MPI rank if the user desires a single process to own the matrix. Alternatively, passing the default value of 'all' will result in all processes owning the matrix. If only a single process owns the undistributed matrix, then all other processes store NULL for that object.

Value

Returns an ordinary R matrix.

Examples

## Not run: 
# Save code in a file "demo.r" and run with 2 processors by
# > mpiexec -np 2 Rscript demo.r

library(pbdDMAT, quiet = TRUE)
init.grid()

dx <- ddmatrix(1:16, ncol=4, bldim=2)
y <- as.matrix(dx, proc.dest=0)

comm.print(y)

finalize()

## End(Not run)

[Package pbdDMAT version 0.4-0 Index]