
function esempio(numero)

clf;
axis normal;


switch numero
    case 1
        
        
        n=1:10;
        an=(-1).^n;
        hold on;
        plot(n,an,'ko','MarkerEdgeColor','k','MarkerFaceColor','g','MarkerSize',10);
        plot(n,2*an,'w');
        hold off;
        
end