R: A Rank Send (Nonblocking) an Object to the Other Rank

isend-method {pbdMPI}

R Documentation

A Rank Send (Nonblocking) an Object to the Other Rank

Description

This method lets a rank send (nonblocking) a object to the other rank in the same communicator. The default return is NULL.

Usage

isend(x, rank.dest = .pbd_env$SPMD.CT$rank.dest,
      tag = .pbd_env$SPMD.CT$tag,
      comm = .pbd_env$SPMD.CT$comm, request = .pbd_env$SPMD.CT$request)

Arguments

`x`	an object to be sent from a rank.
`rank.dest`	a rank of destination where `x` send to.
`tag`	a tag number.
`comm`	a communicator number.
`request`	a request number.

Details

A corresponding recv() or irecv() should be evoked at the corresponding rank rank.dest.

Value

A NULL is returned by default.

Methods

For calling spmd.isend.*():

signature(x = "ANY")
signature(x = "integer")
signature(x = "numeric")
signature(x = "raw")

Author(s)

Wei-Chen Chen wccsnow@gmail.com, George Ostrouchov, Drew Schmidt, Pragneshkumar Patel, and Hao Yu.

References

Programming with Big Data in R Website: http://r-pbd.org/

Examples

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

### Initial.
suppressMessages(library(pbdMPI, quietly = TRUE))
init()
.comm.size <- comm.size()
.comm.rank <- comm.rank()

### Examples.
N <- 5
x <- (1:N) + N * .comm.rank
if(.comm.rank == 0){
  y <- isend(matrix(x, nrow = 1))
} else if(.comm.rank == 1){
  y <- recv()
}
comm.print(y, rank.print = 1)

### Finish.
finalize()

## End(Not run)

[Package pbdMPI version 0.3-1 Index]