Message-ID: <43FD8061.3000001@eligo.de>
Date: 2006-02-23T09:29:05Z
From: Christian Montel
Subject: Questions for manipulating datasets in R e.g. sorting and matching
In-Reply-To: <43FD7B1D.2000602@uwinst.unizh.ch>
hi steffi,
try
DataSort<-Data[order(Data[,5],Data[,6],Data[,8]),1:14]
and for further details ?order. For matching try ?merge.
Best Regards,
Christian
Stefanie von Felten, IPW&IfU schrieb:
> Hello everyone,
>
> I want to sort a dataset in R, using multiple columns as sorting
> criteria. I know I can sort a dataset "Data" with 14 columns using one
> column (the fifth), by typing:
>
> DataSort<-Data[order(Data[,5]),1:14]
>
> But how can the dataset be sorted by column 5, then by 6, then by 8?
>
> Another question is, how two datasets can be matched by a column present
> in both of them?
>
> Steffi
--
Dr. Christian Montel
Eligo GmbH - B??ro Berlin
Friedrichstr. 90
10 117 Berlin
Fon (030) -- 20 25 31 94
Fax (030) -- 20 25 33 33
e-mail: christian.montel at eligo.de
http://www.eligo.de/