base.ownany {pbdBASE} | R Documentation |
For advanced users only. See pbdDMAT for high-level functions.
base.ownany(dim, bldim, ICTXT = 0)
dim |
global dimension |
bldim |
blocking dimension |
ICTXT |
BLACS context |
A simple wrapper of numroc. The return is the answer to
the question 'do I own any of the global matrix?'. Passing a distributed
matrix is allowed, but often it is convenient to determine that information
without even having a distributed matrix on hand. In this case, explicitly
passing the appropriate information to the arguments dim=
,
bldim=
(and CTXT=
as necessary, since it defaults to 0) while
leaving x
missing will produce the desired result. See the examples
below for more clarity.
The return for each function is local.
TRUE or FALSE
spmd.code <- " suppressMessages(library(pbdMPI)) suppressMessages(library(pbdBASE)) init.grid() iown <- base.ownany(dim=c(4, 4), bldim=c(4, 4), ICTXT=0) comm.print(iown, all.rank = TRUE) finalize() " pbdMPI::execmpi(spmd.code = spmd.code, nranks = 2L)