close all
clear all 
clc

t = -1:.1:10;
s = (t>=0).*exp(-t);
figure
plot(t,s)
grid on
xlabel('time [s]')
title('one-sided exponential')

% printing figure in png format
set(gcf,'PaperUnits','inches','PaperPosition',[0 0 4 3])
print -dpng exercise2.png -r100