Matlab - INTERPOLACION POLINOMIO DE LAGRANGE

%Generate 50 points equally spaced along a sine curve in the interval [-5,5].

clear all

x = linspace(-5,5,50);

y = 1./(1+x.^2);

%Use polyfit to fit a 14th-degree polynomial to the points.

p = polyfit(x,y,14);

%Evaluate the polynomial on a finer grid and plot the results.

x1 = linspace(-5,5);

y1 = polyval(p,x1);

figure

plot(x,y,'o')

hold on

plot(x1,y1,'r')

hold off