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clear;
close;
clc;
t=-10:0.1:10;
a=2;
//x(t)=u(t)-u(t-a)
x=[zeros(1,find(t==0)-1) ones(1,find(t==a)-find(t==0)+1) zeros(1,length(t)-find(t==a))];
subplot(2,1,1)
plot(t,x)
xtitle('x(t)','t')
subplot(2,1,2)
plot2d3(t(1:$-1),diff(x))
xtitle('diff(x(t))','t')
//x(t)=t*(u(t)-u(t-a))
xb=t.*x;
figure
subplot(2,1,1)
plot(t,xb)
xtitle('x(t)','t')
subplot(2,1,2)
plot2d(t(1:$-1),diff(xb))
xtitle('diff(x(t))','t')
//x(t)=sgn(t)
x=[-ones(1,find(t==0)-1) ones(1,length(t)-find(t==0)+1)];
figure
subplot(2,1,1)
plot(t,x)
xtitle('x(t)','t')
subplot(2,1,2)
plot2d(t(1:$-1),diff(x))
xtitle('diff(x(t))','t')
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