program Persamaan Non Linear code example

Example: program Persamaan Non Linear

root_rf <- function(f, a, b, tol=1e-7, N=100){
  iter <- 1
  fa <- f(a)
  fb <- f(b)
  x <- ((fb*a)-(fa*b))/(fb-fa)
  fx <- f(x)
  
  while(abs(fx)>tol){
    iter <- iter+1
    if(iter>N){
      warning("iterations maximum exceeded")
      break
    }
    if(fa*fx>0){
      a <- x
      fa <- fx
    } else{
      b <- x
      fb <- fx
    }
    x <- (fb*a-fa*b)/(fb-fa)
    fx <- f(x)
  }
  
  # iterasi nilai x sebagai return value
  root <- x
  return(list(`function`=f, root=root, iter=iter))
}