Nothing
### SHELL> mpiexec -np 2 Rscript --vanilla [...].r
suppressMessages(library(pbdMPI, quietly = TRUE))
.comm.size <- comm.size()
.comm.rank <- comm.rank()
N <- 5
x <- (1:N) + N * .comm.rank
comm.print(x, rank.print = 1)
y <- bcast(matrix(x, nrow = 1))
comm.print(y, rank.print = 1)
y <- bcast(as.integer(x))
comm.print(y, rank.print = 1)
y <- bcast(as.double(x))
comm.print(y, rank.print = 1)
finalize()
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