820364.fig.002a
(a) Contour plot
820364.fig.002b
(b) Class membership indicator
Figure 2: Contour plots: (a) darker grey scale levels represent lower probabilities of 𝑦 = 0 and (b) and show the class membership indicators 𝑦 = 0 and 𝑦 = 1 , respectively, for the covariates ( 𝑥 1 , 𝑥 2 ) .