MATLAB: Index exceeds the number of array elements error

for loopindexMATLAB

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 1×5 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

Best Answer

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
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