[R] create variables with indexes

Greg Snow Greg.Snow at imail.org
Wed Jul 14 05:06:08 CEST 2010

It looks like you want to use a matrix, then you can do proper indexing.  Creating the names will just lead to unnecessary complexity and confusion.

Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of He, Yulei
> Sent: Tuesday, July 13, 2010 4:44 PM
> To: 'r-help at lists.R-project.org'
> Subject: [R] create variables with indexes
> Hi, there:
> Suppose I want create variables with indexes in their names, e.g.,
> X_1_1, X_1_2, X_1_3, ..., X_1_10,  X_2_1, X_2_2, X_2_3, .. X_2_10,...,
> X_10_1, X_10_2, ... X_10_10. It looks like I need to use 2 indexes I
> and J so I is looped from 1 to 10, and J is looped from 1 to 10. But I
> don't know how to automatically produce X with these combination of
> indexes. Should I use paste function? Can someone help?
> Thanks.
> Yulei
> 	[[alternative HTML version deleted]]
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.

More information about the R-help mailing list