Re: [R] mirror vector?

From: Jacques VESLOT <jacques.veslot_at_good.ibl.fr>
Date: Fri 28 Jul 2006 - 17:56:11 EST

 > mat <- matrix(1:16,4,4)
 > mat

      [,1] [,2] [,3] [,4]

[1,]    1    5    9   13
[2,]    2    6   10   14
[3,]    3    7   11   15
[4,]    4    8   12   16
 > apply(mat,2,rev)
      [,1] [,2] [,3] [,4]
[1,]    4    8   12   16
[2,]    3    7   11   15

[3,] 2 6 10 14
[4,] 1 5 9 13

Jacques VESLOT

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niederlein-rstat@yahoo.de a écrit :
> Hello,
>
> I'm an absolut beginner with R and now I got a 2D vector with numbers. I would like to mirror this vector now by the rows (so that the first row becomes last, second becomes one before last, ...).
> I don't know if there is any method I can use to do this.
> Could you please help me?
>
> Antje
>
>
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R-help@stat.math.ethz.ch 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 Jul 28 18:03:26 2006

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