Index exceeds the number of array elements error

When I run below code, I get error: Index exceeds the number of array elements (5).

Can someone please help me understand why I'm getting this error? As for loop is processed 5 times (in below example), shouldnt I get matrix size of 1x5 of 'n' values? like n= [1 0 1 2 3]?

Thank you

>> r=exprnd(1/8, 1,5); 
>> at=cumsum(r);  
>> st=exprnd(1/8, 1, 5); 
>> n = 0; 
>> ord=2:1:6; 
>> n=0;
>> for x=1:5; %x defines # of sims
if at(ord-1) + cumsum(st(ord-1)) ==at(ord)
n=n
elseif at(ord-1) + cumsum(st(ord-1)) < at(ord)
n=n-1
else 
n=n+1
plot(n)
end
end

Answer 1

[VBBV]

Use for loop index to access the vector as below

%if true
  % code
% end
>> r=exprnd(1/8, 1,5); 
>> at=cumsum(r);  
>> st=exprnd(1/8, 1, 5); 
>> n = 0; 
>> ord=2:1:6; 
>> n=0;
>> for x=1:5; %x defines # of sims
if at(ord(x)-1) + cumsum(st(ord(x)-1)) ==at(ord(x))
n=n
elseif at(ord(x)-1) + cumsum(st(ord(x)-1)) < at(ord(x))
n=n-1
else 
n=n+1
plot(n)
end
end

[Daniel Lee]

Thanks Vasishta,

I got 4 results by running your version, but at the end, I'm still getting the same index exceeds the nubmer of array elements (5)...

[Daniel Lee]

Ah, nevermind. I know why. When x=5, ord = 6 which doesnt exist. thanks