/usr/lib/R/site-library/foreach/examples/matmul.R is in r-cran-foreach 1.4.4-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | # simple (and inefficient) parallel matrix multiply
library(foreach)
# generate the input matrices
x <- matrix(rnorm(16), 4)
y <- matrix(rnorm(16), 4)
# multiply the matrices
z <- foreach(y=iter(y, by='col'), .combine=cbind) %dopar% (x %*% y)
# print the results
print(z)
# check the results
print(all.equal(z, x %*% y))
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