Generating an isolated rectangular pulse

How can I generate a pulse of amplitude 1 but only between certain points, like 25 to 75?

T=.2
t=25:75
x=rectpuls(t,T)
plot(t,x)
axis([0 100 0 1.2])

Answer 1

[Walter Roberson]

t = 25:75;
x(t) = T;