Wed Mar 25 11:07:13 2020 

rungekutta4_test
  R version 3.4.4 (2018-03-15) 
  rungekutta4 uses Runge-Kutta 4 to solve an ordinary differential equation.

  f(x,y) = y/(2*x+1)

    x        y
1 0.0 1.000000
2 0.2 1.183234
3 0.4 1.341666
4 0.6 1.483270
5 0.8 1.612485
6 1.0 1.732087

rungekutta4_test
  Normal end of execution.
Wed Mar 25 11:07:13 2020