clear all
close all
clc

t = -10:0.1:10;
s = tanh(t);
figure(1)
plot(t,s,'-b')
grid
xlabel('tempo t [s]')
ylabel('segnale s(t)=tanh(t)')
title('Plot di una tangente iperbolica')

b = 3;
s1 = tanh(t-3);
s2 = tanh(t+3);
figure(2)
plot(t,s1,'-r',t,s2,'-g')
grid
xlabel('tempo t [s]')
legend('traslazione dx','traslazione sx')

a = 3;
s3 = tanh(t/a);
s4 = tanh(a*t);
figure(3)
plot(t,s,'-b')
grid
xlabel('tempo t [s]')
hold on
plot(t,s3,'--r')
plot(t,s4,'-.g')
hold off