Research Article

New Inference Procedures for Semiparametric Varying-Coefficient Partially Linear Cox Models

Figure 1

Results of the simulation study for scenario (I): the estimated curves of the nonzero functional coefficients , , and . The solid, dashed, and dotted curves represent the true function, estimated functions, and 95% pointwise confidence intervals, respectively. Left panel—HARD penalty; right panel—SCAD penalty.
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(a) HARD
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(b) SCAD
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(c) HARD
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(d) SCAD
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(e) HARD
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(f) SCAD