n is pointwise, there is
           no guarantee that the resulting density integrates exactly
           to 1. Renormalization attempts to achieve this.

  The output of locfit() is a Matlab structure:

 fit.data.x (n*d)
 fit.data.y (n*1)
 fit.data.weights (n*1 or 1*1)
 fit.data.censor (n*1 or 1*1)
 fit.data.baseline (n*1 or 1*1)
 fit.data.style (string length d)
 fit.data.scales (1*d)
 fit.data.xlim (2*d)

 fit.evaluation_structure.type (string)
 fit.evaluation_structure.module.name (strin