code: def d_gaussian(h, Xi, x):
      # The derivative of the Gaussian Kernel
      return 2 * (Xi - x) * gaussian(h, Xi, x) / h**2
  
file_path: statsmodels/statsmodels/nonparametric/kernels.py
imports: import numpy
  from scipy.special import erf
label_desc: Use image node_id 11 for calling a global function with example usage: d_gaussian(h, Xi, x) and returns: unknown