code: def _epd_residual(coeffs, mags, fsv, fdv, fkv, xcc, ycc, bgv, bge, iha, izd):
      '''
      This is the residual function to minimize using scipy.optimize.leastsq.
  
      '''
  
      f = _epd_function(coeffs, fsv, fdv, fkv, xcc, ycc, bgv, bge, iha, izd)
      residual = mags - f
      return residuaf _epd_residual(coeffs, mags, fsv, fdv, fkv, xcc, ycc, bgv, bge, iha, izd):
      '''
      This is the residual function to minimize using scipy.optimize.leastsq.
  
      '''
  
      f = _epd_function(coeffs, fsv, fdv, fkv, xcc, ycc, bgv, bge, iha, izd)
      residual = mags - f
      return residual
docs: This is the residual function to minimize using scipy.optimize.leastsq.