convolution of a signal with itself

I need help to make the convolution of a signal with itself. the signal looks like : x(t)=u(t+0.5)-u(t-0.5)

Answer 1

[Guillaume]

Simply use conv:

t = linspace(0, 2*pi, 1000); %for example
u = @sin; %for example
x = u(t+0.5) - u(t-0.5);
selfconv = conv(x, x, 'same'); 
plotyy(t, x, t, selfconv);

Answer 2

[Amna]

t = linspace(0, 2*pi, 1000); %for example

u = @sin; %for example

x = u(t+0.5) - u(t-0.5);

selfconv = conv(x, x, 'same');

plotyy(t, x, t, selfconv);