[GRASS-user] how to change imported table column definitions - using 6.4 in Win XP

[Laszlo Nagy]

Hi,

(!) 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?

(2) nviz creates 3-d visuals of dem's, however none of the features such 
as N arrow, legend, or flower pot can be shown. Also, the height 
exaggeration factor scale bar appears to be very temperamental: either 
doesn't work at all, or doesn't always display values that are believable.

Thank you

Laszlo