Indexing within two for loops where the index can be below zero

Hello,

How do I index within two for loops, see example below. I am running a script (quet) recursively and the output is a 1 by n vector.

for ab=0:1:16
  for bc=0:1:16
      abc=quet(ab,bc);
      Ptr(A)=[abc,ab,bc];
  end  
end

This replaces Ptr(A) each time, I cannot use a matrix as the output of quet is a 1 by n vector, and I cannot use an array as the index contain zero. Ideally I would like to store the output in an array (ab,ab,bc) Thanks

[Azzi Abdelmalek]

What is A?

Answer 1

[Azzi Abdelmalek]

Ptr=[]
for ab=0:1:16
for bc=0:1:16
    abc=quet(ab,bc);
    Ptr(end+1,:)=[abc,ab,bc];
end  
end

[Natialol]

Thanks, this works. But still looking to see if i can get an array of form (ab,ab,bc)

[Azzi Abdelmalek]

what are sizes of ab and bc?

[Natialol]

ab and bc are scalar values. abc is 1 by n vector.

Answer 2

[Iain]

 list1 = 0:1:16;
 list2 = 0:0.5:8;
 list3 = -45:1.23:45;
 c = 0;
 for i = 1:numel(list1)
  val1 = list1(i);
  for j = 1:numel(list2)
   val2 = list2(j);
    for k = 1:numel(list3)
     c = c + 1;
     val3 = lst3(k);
     Output1(i,j,k) = somethign;
     Output2(c) = somethingelse;
    end
   end
 end

Expand as needed ;)