Matlab - Señal cuadrada en MatLab

function x=funciondet(t)

x=0*(t<=-1)+ 1*((t>=-1)&(t<=1))+ 0*((t>=1)&(t<=3)) +1*((t>=3)&(t<=5))+0*((t>=5)&(t<=6));

plot(t,x)

axis([-2 6 -2 3])

t=-2:0.00001:6; funciondet(t);

function periodica(a,b)

close all

hold on

for i=a:4:b

    t=i:0.001:(i+4);

    x=funciondet1(t,[t(1) t(1)+1 t(1)+3 t(1)+4]);

    plot(t,x,'b')

    axis([a b -1 2])

    grid on

end

hold off

end

function x=funciondet1(t,s)

for  i=1:length(t)

if t(i)<=s(2)

    x(i)=0;

elseif t(i)>s(2)&& t(i)<=s(3)

    x(i)=1;

elseif t(i)>s(3)&& t(i)<=s(4)

    x(i)=0;

end

end

end

>> periodica(-2,12)

>> periodica(0,18)

>> periodica(2,18)

function senal_cuadrada1(a,b)

    hold on

    for i=a:4:b

        t=i:0.001:(i+4);

        s=[t(1)+1 t(1)+3 t(1)+4];

        x=(t<=s(1))*0+(t>s(1)& t<=s(2))*1+(t>s(2)& t<=s(3))*0;

        plot(t,x,'r')

        axis([a b -1 2])

        grid on

    end

    hold off

end

senal_cuadrada1(-2,12)