Re: [R] Optimise huge data.frame construction - [ ] Message is from an unknown sender

2010-02-24 Thread Daniele Amberti
Message- From: Moshe Olshansky [mailto:m_olshan...@yahoo.com] Sent: 24 February 2010 11:09 To: r-help@r-project.org; Daniele Amberti Subject: Re: [R] Optimise huge data.frame construction - [ ] Message is from an unknown sender Hi Daniele, One possibility would be to make two runs. In the first

Re: [R] Optimise huge data.frame construction

2010-02-24 Thread Moshe Olshansky
wrote: > From: Daniele Amberti > Subject: [R] Optimise huge data.frame construction > To: "r-help@r-project.org" > Received: Wednesday, 24 February, 2010, 8:34 PM > I have data for different items (ID) > in a database. > For each ID I have to get: > > -   

[R] Optimise huge data.frame construction

2010-02-24 Thread Daniele Amberti
I have data for different items (ID) in a database. For each ID I have to get: - Timestamp of the observation (timestamp); - numerical value (val) that will be my response variable in some kind of model; - a variable number of variables in a know set (if value for a