How do I print and save the graphs at each n?

I tried using eval(['print -djpeg part2_' num2str(t) '.jpeg']); , however, it replaces the old one with new graph each time. At the end, it only shows the latest and newest graph.

clear all
clc

%Inputs
alphaA = 1e-6;
alphaB = 2e-6;

delta_t = 15;

xlength = 20*10^-3;
nx = 20;
delta_x = xlength/nx;

% Arrays
x=[linspace(0,20,21);
   linspace(0,20,21);
   linspace(0,20,21);
   linspace(0,20,21);
   linspace(0,20,21);
   linspace(0,20,21)];

y=[zeros(1,21);
   ones(1,21);
   2*ones(1,21);
   3*ones(1,21);
   4*ones(1,21);
   5*ones(1,21)];

%Initial Condition
T=300*ones(6,21,1);

%Boundary Conditions
    T(1,:,1) = 320;
    T(6,:,1) = 310;
    T(:,1,1) = 300;
    T(:,21,1) = 300;

dA = alphaA*0.05/delta_x^2;
dB = alphaB*0.05/delta_x^2;
dT = delta_t*20;


d = dA*ones(6,21);
d(1:3,1:4)=dB;
d(1:4,19:21)=dB;

for n=1:dT
    T(1,:,n) = 320;
    T(6,:,n) = 310;
    T(:,1,n) = 300;
    T(:,21,n) = 300;
    for j=2:5
        for i=2:20
            T(j,i,n+1) = T(j,i,n) + d(j,i)*(T(j+1,i,n)+T(j-1,i,n)-4*T(j,i,n)+T(j,i+1,n)+T(j,i-1,n));
        end
    end
    contourf(x,y,T(:,:,n))
    pause(0.01);
end

Answer 1

[Walter Roberson]

filename = sprintf('part2_%d.jpeg', n);
print('-djpeg',  filename);

after the pause()

[Nur Zawani Rosli]

It worked!! Thanks a lot :)