Basic question again : How plot a finite length rectangular pulse

Im trying to plot this signal: x(n)=1 for n=2:4 . I tried by rectpuls :

figure
n=2:4;
y=rectpuls(n);
stem (y);

But surprisingly I get 0 for all three samples of y. Is there any other way to do that? (Ive found that if I write y=rectpuls(n)+1 , it works. However I don't want to cheat and manipulate the code!)

Thanks a lot for any help !

[Azzi Abdelmalek]

%rectpuls(n)=1 if n=0 
%rectpuls(n)=0 if n~=0

Answer 1

[Azzi Abdelmalek]

n=2:4;
y=ones(1,numel(n))
stem(n,y)

[Negar]

Thank you