Thanks to all but I think that only Walter got my question. I know about structures. However, my task is to save a column variable by only knowing the name of the corresponding header. In the end I should be able to write something like
iter=data('iter')
This is very useful when you import different files which share similar headers but where similar variables have different positions. I would simply like to avoid to retrieve the number of the column of each variable am interested in from each single file. If we could remember the name of the variables (like iter), then it would be a peace of cake to store what we want.
Chiara