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Hi guys, I''m having problems removing the default from a boolean field. I''m using the following statement: change_column :valuations, :too_many_adults, :integer, :null => true but it''s adding DEFAULT ''0'' to the SQL statement. I''m having no luck using change_column_default either. Is this possible? Gareth

I would be incredibly grateful to anyone who'll help me translate some SAS code into R code. Say for example that I have a dataset named "dat1" that includes five variables: wshed, site, species, bda, and sla. I can calculate with the following SAS code the mean, CV, se, and number of observations of "bda" and "sla" for each combination of