How to use a variable from one for loop in another for loop?

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Hello,

I would like to use a variable I have created inside a for loop within another for loop without having to redefine it. Here is my code:

Econn = [(1:nn-1)',(2:nn)']; %Connectivity matrix - i.e. 1 connects to 2, 2 connects to 3 etc. The ' symbol produces transpose
for i = 1:ne
    indexNodes= Econn(i,:); %Gives the ith row of matrix Econn. It gives the two nodes that should be connected.
    ElmtCentre(:,i) = [0.5*sum(NodeX(indexNodes)), 0.5*sum(NodeY(indexNodes))]; %Calculates half of the sum of the two connected nodes. i.e. node 0 and 1 connected therefore ElmtCentre = 0.5
    text(ElmtCentre(1,i), ElmtCentre(2,i)+0.05, ['E', num2str(i)]); %Displays text indicating each element visualise it.
    Node1 = [NodeX(indexNodes(1)); NodeY(indexNodes(1))]; 
    Node2 = [NodeX(indexNodes(2)); NodeY(indexNodes(2))];
    L(i) = norm(Node1-Node2);
end
Sy = 0;
Mz = 0;
for i=1:ne
    Fy = L(i)*Qy(i);
    Sy = Sy+ - Fy;
    R = [ELmtCentre(:,i);0];
    F = [0;Fy;0];
    Mz = Mz + - cross(R,F);
end

I want to use the ElmtCentre variable in the other for loop shown without having to define indexNodes and ElmtCentre again. However, when this code is run i get the following error message:

'Unrecognized function or variable 'ELmtCentre'.

Error in BendingMomentDistForce (line 30)

R = [ELmtCentre(:,i);0]; '.

Please let me know if this does not make sense.

Thanks.