On Fri, 19 Oct 2012, mariusz doszyń wrote:
Thanks for your response, I've already used .csv file. With respect to error message,
as
I remember it was something about sign sequences instead of numerical values (there are
many missing values in this file, esspecially at the beginning).
It would help a lot if you were a little more specific about the error
message you're getting. Better still, if you could provide an example xlsx
file that provokes the error, that would be great.
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Riccardo (Jack) Lucchetti
Dipartimento di Economia
Università Politecnica delle Marche
(formerly known as Università di Ancona)
r.lucchetti(a)univpm.it
http://www2.econ.univpm.it/servizi/hpp/lucchetti
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