[R] mirror vector?

[Patrick Burns]

Another approach is:

mat[nrow(mat):1, ]

Patrick Burns
patrick at burns-stat.com
+44 (0)20 8525 0696
http://www.burns-stat.com
(home of S Poetry and "A Guide for the Unwilling S User")

Jacques VESLOT wrote:

> > 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
>
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>Jacques VESLOT
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>
>niederlein-rstat at 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
>>
>> 		
>>---------------------------------
>>Was Sie schon immer wissen wollten aber nie zu Fragen trauten? Yahoo! Clever hilft Ihnen.
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>>______________________________________________
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>>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>and provide commented, minimal, self-contained, reproducible code.
>>
>>    
>>
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
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>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
>
>
>  
>