From: jim holtman <jholtman_at_gmail.com>

Date: Mon, 04 Apr 2011 00:41:58 -0400

*> closeAllConnections()
*

*> # put NAs in diagonals
*

*> diag(x) <- NA
*

*> # get the order
*

*> x.ord <- t(apply(x, 1, order))
*

*> # remove last column since this is where NAs sort
*

*> x.ord[, -ncol(x.ord)]
*

*>
*

Date: Mon, 04 Apr 2011 00:41:58 -0400

I assume that this is what you did, and I would not call that cheating; it is just a reasonable way to solve the problem:

*> x <- as.matrix(read.table(textConnection(" 0.000000 2.384158 2.0065682 2.2998856
*

+ 2.384158 0.000000 1.4599928 2.4333213 + 2.006568 1.459993 0.0000000 0.9733285 + 2.299886 0.000000 0.9733285 0.0000000")))

[,1] [,2] [,3]

[1,] 3 4 2 [2,] 3 1 4 [3,] 4 2 1 [4,] 2 3 1

On Sun, Apr 3, 2011 at 11:51 PM, Vivian Shih <vivs_at_ucla.edu> wrote:

> Sorry if this is a stupid question but I've been stuck on how to code so

*> that I can order rows of a matrix without paying attention to the diagonal
**> elements.
**>
**> Say, for example, I have a matrix d:
**>>
**>> d
**>
**> [,1] [,2] [,3] [,4]
**> [1,] 0.000000 2.384158 2.0065682 2.2998856
**> [2,] 2.384158 0.000000 1.4599928 2.4333213
**> [3,] 2.006568 1.459993 0.0000000 0.9733285
**> [4,] 2.299886 0.000000 0.9733285 0.0000000
**>
**> Then I'd like ordered d to be like:
**> [,1] [,2] [,3]
**> [1,] 3 4 2
**> [2,] 3 1 4
**> [3,] 4 2 1
**> [4,] 2 3 1
**>
**> So subject 1's smallest value is in column 3. Subject 2's second smallest
**> value would be 3, etc. Note that subject 4 has two zeros (a "tie") but if
**> the diagonals are not in the equation, then the minimum value for this
**> subject is from column 2.
**>
**> Right now I coded off diagonals as missing and then order it that way but I
**> feel like it's cheating. Suggestions??
**>
**> ______________________________________________
**> 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.
**>
*

-- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? ______________________________________________ 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 Mon 04 Apr 2011 - 04:46:55 GMT

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