function [ vector ] = drawTreeVec(treeNode, vector , parIndex)
    if(parIndex~=-1) %vector = []
        vector = [vector parIndex];
    else
        vector = [vector 0];
    end

    myIndex = length(vector);

    if isempty(treeNode.childNode) %If this node is a leaf
        return;
    else
        for i =1:length(treeNode.value)
            vector = drawTreeVec(treeNode.childNode{i}, vector, myIndex);
        end
    end
end