PROBLEM:4 - #Sheet8

T = [ 5.75,5,4.2,3.4,2.7,1.05,0.7,0.5];
N = [500,800,1300,1800,2250,4500,5000,5750];

T_interpol = 1:1:3 ; % we will create a vector of = [1,2,3]
N_interpol = interp1(T,N,T_interpol); % this will give us the values at the vector [1,2,3]

a = polyfit(T,N,4);
TT = 0:0.1:5.75;
NN = polyval(a,TT);

plot(T,N,'d',TT,NN)