Install devtools::install_github('ignacio82/MyPi') Rpi Rpi(DARTS = 5000, ROUNDS = 100) Fpi Fpi(DARTS = 5000, ROUNDS = 100) SnowPi SnowPi(DARTS = 5000, ROUNDS = 100, numprocs=2) Benchmark Pibenchmark(DARTS = 5000, ROUNDS = 100, times = 10) or LongPibenchmark(times=1)