clc, clear
%format long
format short
format compact

%x = [1 4 6 5]';
%x = [1 6]';
%y = log(x);
x=[2 3 4 5];
y=[60 68 77 110];

%x=[0 20];
%y=[3.85 0.8];

%x = [1 2 2.5];
%y = [1 5 7];

x_int=3.5;

y_int = d4_Lagrange(x,y,x_int);

fprintf('\n f(%g) = %0.4f \n\n', x_int,y_int)