hello all, I tried to make calculations between attributes and insert the results in new columns, in vector files, but can not find an easy way to do also is very difficult to edit or delete an attribute not know if I'm doing something wrong or is it something program, which surprises me the level of complication that occurs to be a chore, been reviewing the documentation, but can not find anything about it, but routine suggested for this sql based standard of Grass gis.
thanks for your answers PS: I use the svn version 6.5 Ricardo Rodríguez Univalle
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