[R] Inverting data frame...row wise

[Daniel Malter]

So you want to make columns

1,2,3,4

into

4,3,2,1

or into

4,1,2,3?

The first option is done by:

x=c(rep(1,10),rep(2,10),rep(3,10),rep(4,10))
dim(x)=c(10,4) 
x=data.frame(x) #create data

x2=x[,order(-1:-4)] #invert column order

 


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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 milicic.marko
Gesendet: Thursday, September 25, 2008 5:24 PM
An: r-help at r-project.org
Betreff: [R] Inverting data frame...row wise

Hi,

I have the data.frame with 4 columns. I simply want to invert dataset so
that last row becomes first...

I tried with rev(my_data-frame) but I got my columns inverted... not my rows


Thanks

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