From: Esmail Bonakdarian <esmail.js_at_gmail.com>

Date: Tue, 06 May 2008 15:06:58 -0400

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. Received on Tue 06 May 2008 - 19:10:18 GMT

Date: Tue, 06 May 2008 15:06:58 -0400

Hello,

Still a newbie with R, though I have learned a lot from reading this list. I'm hoping someone can help with this question:

I have two vectors, one for variables, and one for bits.

vars=c('X.1', 'X.2', 'X.3', 'X.4', 'X.5')

bits=c(1, 0, 1, 1, 0)

ones=which(bits==1)

where as

bits=c(1, 1, 0, 0, 0)

would yield

the "which" operator gives me the index values, is there an easy and *efficient* way to build this string so that I can pass it on to glm? I can probably hack some ugly code together to do this, but it won't be efficient, and it won't be elegant :-)

Can anyone help?

Thanks!

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. Received on Tue 06 May 2008 - 19:10:18 GMT

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