Least Absolute Deviation Estimate for Functional Coefficient Partially Linear Regression Models

Figure 4

Simulation results for 𝑎₀(𝑥). Dotted curves are 𝐿₂ estimators; solid curve are the true curves. (N) plot without outliers, (Y) plot with three outliers (𝑥,𝑦)=(−0.4538,−5), (0.1948,8), and (0.4649,5).

(a)

(b)