[R] Setting elements in data frame

[Jan Goebel]

Hello,

what about converting the data.frame to a matrix?

x <- data.matrix(x)
x[x==6] <- 6000
x <- as.data.frame(x)
x
  S1   N1   N2
1  2    2 6000
2  3    4   NA
3  4 6000    0
4  1    9 6000

best,

jan

On Thu, 22 Feb 2001, Christian Hoffmann wrote:

> Hi all,
> 
> I have a problem which I am biting my teeth into unsuccessfully:
> 
>  (x <- data.frame(S1=c("a","b","d","F"),N1=c(2,4,6,9),N2=c(6,NA,0,6)))
>   S1 N1 N2
> 1  a  2  6
> 2  b  4 NA
> 3  d  6  0
> 4  F  9  6
> > is.na(x)
>      S1    N1    N2
> 1 FALSE FALSE FALSE
> 2 FALSE FALSE  TRUE
> 3 FALSE FALSE FALSE
> 4 FALSE FALSE FALSE
> 
> No I want to be able to do:
> 1) Setting all elements == 6 to 6000
> x[x == 6] <- 6000
> Error in [<-.data.frame(*tmp*, x == 6, value = 6000) : 
> 	matrix subscripts not allowed in replacement

-- 
+-----------------------------------
 Jan Goebel (mailto:jgoebel at diw.de)

 DIW Berlin 
 Longitudinal Data and Microanalysis
 Königin-Luise-Str. 5
 D-14195 Berlin -- Germany --
 phone: 49 30 89789-377
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