Programming with Big Data in R: Difference between revisions

Revision as of 16:31, 3 December 2022

Revision as of 00:37, 23 June 2023

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=== Example 1 ===

Hello World! Save the following code in a file called "demo.r"

<syntaxhighlight lang="rsplusr">

### Initial MPI

library(pbdMPI, quiet = TRUE)

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The following example modified from pbdMPI illustrates the basic [[programming language syntax|syntax of the language]] of pbdR.

Since pbdR is designed in [[SPMD]], all the R scripts are stored in files and executed from the command line via mpiexec, mpirun, etc. Save the following code in a file called "demo.r"

<syntaxhighlight lang="rsplusr">

### Initial MPI

library(pbdMPI, quiet = TRUE)

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The following example modified from pbdDEMO illustrates the basic ddmatrix computation of pbdR which performs [[singular value decomposition]] on a given matrix.

Save the following code in a file called "demo.r"

<syntaxhighlight lang="rsplusr">

# Initialize process grid

library(pbdDMAT, quiet=T)