[GRASS-user] exponentiation with v.db.update

[Dylan Beaudette]

Hi,

Which database back-end are you using? I seem to recall that the DBF
back-end only supports a very limited subset of update operations.

cheers,
Dylan

On Tue, Jun 9, 2009 at 8:56 AM, A. Marcia
BARBOSA<anamarciabarbosa at gmail.com> wrote:
> Hi,
> I'm trying to populate a column with 10 raised to the power of the
> values in another column:
>
> v.db.update map=ItaReg column=x qcolumn=10^logx
>
> but I get a dbmi protocol error. I've tried using either single or
> double quotes with no success. If I use a combination of both, i.e.
> "qcolumn= ' 10^logx ' " it doesn't report any error, but doesn't do
> the operation either (the column remains unchanged).
>
> It works fine for other operations (e.g. 10*logx), though. Is there
> another way in which I should specify the exponentiation?
>
> Thanks,
> Marcia
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
>