[R] How to sort the elements in a matrix?

[Daniel Malter]

ab[order(ab[,1]),] 


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cuncta stricte discussurus
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-----Ursprüngliche Nachricht-----
Von: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Im
Auftrag von FMH
Gesendet: Tuesday, September 22, 2009 1:20 PM
An: r-help at r-project.org
Betreff: [R] How to sort the elements in a matrix?

Dear All,

Let ab is the combination of matrices a and b.


a <- matrix(c(1,2,3,4), nrow = 2, ncol = 2) b <- matrix(c(4,3,1,2), nrow =
2, ncol = 2) ab <- rbind(a, b)
 
>From matrix ab, could someone give some advice on the way to
sort all elements in column 2, by the sequence of the elements in column 1
in ascending order?
 
Thank you.
Fir




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