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x %*% y
## S3 method for class 'ddmatrix,ANY':
crossprod(x, y = NULL)
## S3 method for class 'ddmatrix,ANY':
tcrossprod(x, y = NULL)x and y must be conformable, on the same BLACS context, but
they need not be blocked with the same blocking dimension. The
return will default to the blocking dimension of x.
If you need to use x and y with differing
blocking dimensions and you want the return to have blocking
different from that of x, then use the function
base.rpdgemm().
The crossprod() and tcrossprod() functions behave exactly as
their R counterparts.Arithmetic, LinAlg, MatMult# 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()
# don't do this in production code
x <- matrix(1:9, 3)
x <- as.ddmatrix(x)
y <- x %*% x
print(y)
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