Code for Nonlinear Classification Models

• chap_13_prob_1.R (solves chapter 13 problem 1)
  
• chap_13_prob_2.R (solves chapter 13 problem 2)
  
• build_AUC_nonlinear_models.R (builds many nonlinear models optimizing the area-under-the-curve (AUC) metric)
  
• build_PCC_nonlinear_models.R (builds many nonlinear models optimizing the probability of correct classification (PCC) metric)