he
           family, choices may be 'ident', 'log', 'logit',
           'inverse', 'sqrt' and 'arcsin'. 
 
  Evaluation structures.
    By default, locfit chooses a set of points, depending on the data
    and smoothing parameters, to evaluate at. This is controlled by
    the evaluation structure.
      'ev' Specify the evaluation structure. Default is 'tree'.
           Other choices include 'phull' (triangulation), 'grid' (a grid
           of points), 'data' (each data point), 'crossval' (dat