1. This is a data frame, not a matrix ! -- ?data.frame
2. help.search("sort") is the first thing you should have done. You probably
wouldn't have needed to post if you had.
3. The canonical answer is ?order and indexing -- as in:
yourdf[order(yourdf$Age),]
Note that order() can be used to sort by more than one column -- e.g. Sex
and then Age within Sex.
4. The orderBy() function in the doBy package -- and probably there are
others -- can do this exactly.
Cheers,
Bert Gunter
Genentech, Inc.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Angelo Scozzarella
Sent: Thursday, July 10, 2008 11:21 AM
To: [email protected]
Subject: [R] Sorting a matrix
Hi,
I want to sort a matrix by a specific variable without changing the
row binding between variables.
Ex.
Name Sex Age
Fred M 24
John M 18
Mary F 21
ordered by Age
Name Sex Age
John M 18
Mary F 21
Fred M 24
Thanks
Angelo
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______________________________________________
[email protected] mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
