code: def mad(y_pred, y_true):
      return np.median(np.abs(y_pred - y_true))
  
file_path: DALEX/python/dalex/dalex/model_explanations/_model_performance/utils.py
imports: import numpy
  import pandas
label_desc: Use image node_id 3 for calling a global function with example usage: mad(y_pred, y_true) and returns: np