fig2_4

 Local Regression and Likelihood, Figure 2.4.

 Bivariate Local Regression.

0001 % Local Regression and Likelihood, Figure 2.4.
0002 %
0003 % Bivariate Local Regression.
0004 
0005 load ethanol;
0006 
0007 alp = [0.25 0.3 0.49 0.59];
0008 lab = {'Local Constant' 'Local Linear' 'Local Quadratic' 'Local Cubic'};
0009 f=['a','b','c','d'];
0010 for (i=1:4)
0011   figure('Name', sprintf( 'figure2_4%c: Bivariate local regression', f(i) ) );
0012     fit = locfit(E,NOx,'deg',i-1,'alpha',alp(i));
0013     lfplot(fit);
0014     title(lab(i));
0015 end;