Try this:
t1 = -5;
t2 = -1;
t3 = 5;
t4 = 8;
fcn = @(t) (t < t1).*0 + ((t >= t1) & (t <= t2)).*(2*t+3) + ((t > t2) & (t < t3)).*1 + ((t >= t3) & (t <= t4)).*(-5*t-4);
t = linspace(-10, 10, 500);
figure
plot(t, fcn(t))
grid
Use your own values for ‘t1’ ... ‘t4’. This is simply an illustration.
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