[GRASS-user] creating new attributes

2010-07-29 Thread Ricardo Rodríguez
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

Re: [GRASS-user] creating new attributes

2010-07-29 Thread Daniel Victoria
Ricardo, This is not an answer to your question but rather a question to the list. Can v.db.update take as values a formula using data from other collumns? Or would I need to use db.execute to do something like new_column = col_A + col_B Daniel On Thu, Jul 29, 2010 at 4:57 PM, Ricardo Rodríguez