ompexamples: OpenMP Examples

In wrathematics/Romp: R OpenMP Examples

Description

There are 3 examples, each using OpenMP, across 4 implementations: C, C++, F77, and F2003.

Usage

c_hello()

c_sum(x)

c_sweep(x, vec)

c_primesbelow(n)

f77_hello()

f77_sum(x)

f77_sweep(x, vec)

f77_primesbelow(n)

f90_hello()

f90_sum(x)

f90_sweep(x, vec)

f90_primesbelow(n)

rcpp_hello()

rcpp_sum(x)

rcpp_sweep(x, vec)

rcpp_primesbelow(n)

Arguments

x	A numeric vector for the sum example, and a numeric matrix for the sweep example.
vec	A numeric vector the same length as the number of rows as x.
n	The number from the "primes below" example, where the function returns the total number of primes below n.

Details

The _hello() functions are simple hello worlds. Note that the order of printing by the threads is not guaranteed.

The _sum() functions sum up a numeric vector.

The _sweep() functions sweep a numeric vector from a numeric matrix, provided the vector is exactly the length of the number of columns of the matrix. This is equivalent to a special case of sweep(x, STATS=vec, MARGIN=1, FUN="-").

The _primesbelow() functions compute the number of prime integers below a given (positive) integer.

wrathematics/Romp documentation built on May 4, 2019, 9:48 a.m.