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. Author manuscript; available in PMC: 2015 Jan 12.
Published in final edited form as: Stat Sin. 2011 Oct;21(4):1831–1856. doi: 10.5705/ss.2009.328

Figure 4.

Figure 4

First simulation set-up given in (9) with highly sparse design: (a) The cross-sectional median curves of the proposed estimates (grey) along with 5% and 95% cross-sectional percentiles (dotted) overlaying the true varying coefficient function β0(t) (solid). Also displayed are the cross-sectional median curves from fits using kernel linear smoothing (dash-dotted). Similarly, for (b) β1(t) and (c) α1(t). (d) Boxplots for the logarithm of the ratios of error measures (MADE, WASE and UASE) for proposed estimates over kernel linear smoothing. Values smaller than zero show that the proposed method is superior.