> 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
CNRS UMR 8090
I.B.L (2ème étage)
1 rue du Professeur Calmette
B.P. 245
59019 Lille Cedex
Tel : 33 (0)3.20.87.10.44
Fax : 33 (0)3.20.87.10.31
http://www-good.ibl.fr
-------------------------------------------------------------------
[EMAIL PROTECTED] 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
>
>
> ---------------------------------
> Was Sie schon immer wissen wollten aber nie zu Fragen trauten? Yahoo! Clever
> hilft Ihnen.
> [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>
______________________________________________
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and provide commented, minimal, self-contained, reproducible code.
