masterslavePI.R 	R script to compute PI=4*\int_0^1 1/(1+x^2) dx.
simplePI.R 		R function to compute PI using slavedaemon.R. 
slave1PI.R 		R functions to compute PI using slavedaemon.R (load 
			balancing with a sever and workers). Use master1PI to 
			run the program.
slave2PI.R 		R functions to compute PI using slavedaemon.R (load 
			balancing with workers only). Use master2PI to run the 
			program.
cslavePI.R		R function to use external C program cslavePI.
			Copy cslavePI.c in Rmpi library directory to your 
			working directory and compile as "mpicc -o 
			cslavePI cslavePI.c"
simPI.R                 Use Monto Carlo simulation to compute PI (with plot). 
                        Use simPI to run the program. Use mpi.init.sprng 
			to initialize SPRNG first.

