How can I generate a continious signal? Generating a pulse?

Hello,

My problem is to generate a pulse. While x-axis values are between 0 and 1, y-axis is equal to 1 except that x-axis are between 0.5 and 0.75, y is equal to -1.

How can I create a unit step like this?

Thanks

[Azzi Abdelmalek]

Could you be more clear?

Answer 1

[Azzi Abdelmalek]

t=0:0.001:1
y=ones(1,numel(t))
y(t>0.5 & t<0.75)=-1
plot(t,y,'r','linewidth',3)

[Serhat]

Ooo, thank you so much. What is "numel" doing there exactly?

[Azzi Abdelmalek]

x=[2 4 6 8] 
n=numel(x) % number of elements in x