search for: dbcreat

Hello, I'm using filehash on the windows XP and it has been working fine with the newest R version 2.6.2. However, on the windows vista, when I ran the same code, I got the following error: > dbCreate("simdb") #create simdb database [1] TRUE > db<-dbInit("simdb") #initiate an object of database Error in sprintf(gettext(fmt, domain = domain), ...) : object "datafile" not found > Thanks, Davood [[alternative HTML version deleted]]

...ry well. However, recently I found filehash gives an error when I need to do something like db[c("a", "b")] when the db is in RDS format. Does any one know a way to get around that? The code below reproduces the error thanks Jeff filehashOption(defaultType = "DB1") dbCreate("mydb3", type = "DB1") db = dbInit("mydb3") db$a = rnorm(100, 1) db$b = rnorm(100, 1) with(db, c(a = mean(a), b = mean(b))) sapply(db[c("a", "b")], mean) # works. filehashOption(defaultType = "RDS") dbCreate("mydb4", type = &...

How to empty DB in heroku<http://stackoverflow.com/questions/4820549/how-to-empty-db-in-heroku> I have a Postgres database on Heroku. It is one of the free beta ones. Locally, when testing, I often run rake db:drop && rake db:create && rake db:migrate as a way to reset the database. However, when I try to run this on Heroku, I get the error:\[code\]Couldn''t drop