Hi
I have used merge() to merge two data frames, very much like performing
a SQL join. Now I want to do a few different SQL-style things and I
wondered if there were functions to do it...
Is there a group by style function? For example if I merge() two data
frames and end up with multiple
Hi Michael
On 1 Dec 2004 at 11:50, michael watson (IAH-C) wrote:
Hi
I have used merge() to merge two data frames, very much like
performing a SQL join. Now I want to do a few different SQL-style
things and I wondered if there were functions to do it...
Is there a group by style
://www.student.kuleuven.ac.be/~m0390867/dimitris.htm
- Original Message -
From: michael watson (IAH-C) [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, December 01, 2004 12:50 PM
Subject: [R] Data Frame Manipulations
Hi
I have used merge() to merge two data frames, very much like
performing
a SQL
