R/sample_function2.R

In TillF/ppso: Particle Swarm Optimization and Dynamically Dimensioned Search, optionally using parallel computing based on Rmpi

sample_function2 <-
function(param_vec,maxwaittime=0)          #objective function to be minimized
{
  r <- max(1e-320,sqrt((param_vec[1]*4)^2+(param_vec[2]*4)^2)) 
  obj=-5 * sin(r)/r 

  if (maxwaittime>0)  #function to be run on slaves, with random delay
    Sys.sleep(maxwaittime)

  return(obj)
}