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. Author manuscript; available in PMC: 2013 Jun 19.
Published in final edited form as: Biometrika. 2013 Jun;100(2):371–383. doi: 10.1093/biomet/ass075

Fig. 1.

Fig. 1

Comparison of sliced inverse regression (SIR) and principal Hessian directions (PHD) with their semiparametric counter parts (SEMI-SIR, SEMI-PHD) in model (I) (left half in each panel) and model (II) (right half in each panel). Results are based on 1000 simulated data sets with sample size n = 200.