close all
clear all 
clc

t = -10:.1:10;
figure
for u = -9:10
    subplot(4,5,u+10)
    plot(t,tanh(t),t,tanh(u-t))
    grid on
    title(['u = ' num2str(u)])
end

% printing figure in png format
set(gcf,'PaperUnits','inches','PaperPosition',[0 0 8 6])
print -dpng homework2.png -r100