From: Gabor Grothendieck <ggrothendieck_at_gmail.com>

Date: Fri, 11 Apr 2008 18:05:29 -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 Fri 11 Apr 2008 - 22:09:00 GMT

Date: Fri, 11 Apr 2008 18:05:29 -0400

Try this:

as.matrix(replace(as.data.frame(0 * dx), colnames(dy), dy))

If dx were a data frame already we could eliminate as.data.frame and as.matrix so it would reduce to, in that case:

replace(0 * dx, colnames(dy), dy)) # only if dx is data.frame

On Fri, Apr 11, 2008 at 5:36 PM, Jorge Velez <jorgeivanvelez_at_gmail.com> wrote:

> Dear R users,

*>
**> I'm working with 2 data sets which look like (for example) dx and dy in the
**> next code:
**>
**> # Seed
**> set.seed(4)
**>
**> # First data frame
**> dx=matrix(rnorm(6*5),ncol=6)
**> colnames(dx)=LETTERS[1:6]
**>
**> # Second data frame
**> dy=matrix(rnorm(3*5),ncol=3)
**> colnames(dy)=c('A','C','E')
**>
**>
**> As you will notice, some columns in both data sets have the same names. At
**> the end, what I need is something like:
**>
**>
**> > res
**> A B C D E F
**> [1,] 0.1534642 0 -0.4045198 0 1.3437086 0
**> [2,] 1.0519326 0 -0.2274054 0 0.1815354 0
**> [3,] -0.7542112 0 0.9340962 0 1.2925123 0
**> [4,] -1.4821891 0 -0.4658959 0 -1.6880486 0
**> [5,] 0.8611319 0 -0.6375435 0 -0.8209936 0
**>
**>
**> where columns "A", "C" and "E" are the dy columns and columns "B" and "D"
**> are zeros because, when we compare dx and dy, they are not present. Any
**> suggestion would be greatly appreciated.
**>
**> Thanks in advance,
**>
**>
**> Jorge
**>
**> [[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.
**>
*

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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 Fri 11 Apr 2008 - 22:09:00 GMT

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