SLAP Grid Information {pbdSLAP} | R Documentation |
These functions initializes a grid of pbdSLAP
, assigns the
information to a global object, and free the grid.
slap.init.grid(nprow, npcol = 1, ictxt = 0) slap.exit.grid(ictxt) slap.finalize(quit.mpi = FALSE)
nprow |
number of row processors. |
npcol |
number of column processors. |
ictxt |
the grid id |
quit.mpi |
if finalize MPI. |
This function arranges all processors in a (nprow * npcol) grid and the grid will map the big data matrix.
slap.init.grid
assigns a global object .__grid_info_0
for
ictxt = 0
containing the grid information. slap.exit.grid
free the grid. slap.finalize
free all memory.
Wei-Chen Chen wccsnow@gmail.com, Drew Schmidt, George Ostrouchov, and Pragneshkumar Patel.
Programming with Big Data in R Website: http://r-pbd.org/
ScaLAPACK Website: http://www.netlib.org/scalapack/
ScaLAPACK Block Cyclic Data Distribution Website: http://icl.cs.utk.edu/lapack-forum/viewtopic.php?f=5&t=4922
## Not run: ### Under command mode, run the demo with 2 processors by ### (Use Rscript.exe for windows system) mpiexec -np 2 Rscript -e "demo(gridinfo,'pbdSLAP',ask=F,echo=F)" ## End(Not run)