On Tue, 21 Dec 2010, Marco Lechner - FOSSGIS e.V. wrote:
do I have to recode all my non-numeric columns like that? can't
handle non-numeric values?
If you save your spreadsheet data as comma-separated values, gretl
will convert the non-numerical columns to numerical values on
import (and will write out a "string table" showing the mapping
from strings to values).