a = 0; b = 2;
xmany = linspace(a,b,500);
for n = 2:2:30,
    x = linspace(a,b,n+1);
    y = max(1,x);
    ymany = max(1,xmany);
    p = spline(x,y,xmany);
    
    subplot(2,1,1);
    plot(xmany,ymany,'b-',xmany,p,'r-');
    makelarge
    title(sprintf('Vollst. Spline, n = %i',n));
 
    subplot(2,1,2);
    semilogy(xmany,abs(ymany-p),'r-');
    makelarge
    title('Interpolationsfehler');
    pause
end