<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Feb 9, 2010, at 5:11 AM, Laszlo Nagy wrote:</div><blockquote type="cite"><div><font class="Apple-style-span" color="#000000"><br></font>(!) Have imported a csv to make a vector map. All cols are listed as char. There are numeric columns (either two decimal values) that are listed as char. How can I change them to be numeric?<br></div></blockquote></div><br><div>I had trouble with this recently - one cause of the problem in my case was the presence of data gaps -- any column with a data gap seemed to be imported as a 'char' column. When I modified the table to eliminate missing data it worked fine. </div><div><br></div><div>Also, by importing the csv table into an sqlite database, and using v.in.db, the results seem more predictable. First you can review the real table properties better than with a simple csv table and second, it's then easier to edit out any problems or redefine columns. The SQlite Database Browser is a good tool for this.</div><div><br></div><div>Stu</div></body></html>