[R] read.table conversion question

[Peter Dalgaard BSA]

Myriam Abramson <mabramso at gmu.edu> writes:

> Hi!
> 
> I would like to read data read with read.table row by row into a
> c() vector. 
> 
> data<-read.table("test",header=FALSE)
> for (i in 1:length(data[[1]])) {
>       temp <- ??
>       do something with temp
>         }
> 
> data[1,] gives me 
>   V1 V2 V3 V4   V5
> 1  1 -1 -1 -1 0.33
> 
> c[temp[1],temp[2]) gives me
> $V1
> [1] 1
> 
> $V2
> [1] -1
> 
> 
> Sorry if that's well known but I can't still figure it out. 

Data frames are essentially lists of variables, and a row of a data
frame is a list as well (it must be able to hold values of different
modes). To turn it into a vector, you can use unlist():

 data(airquality)
 c(airquality[1,])
 unlist(airquality[1,])

or, same effect:

 c(airquality[1,], recursive=TRUE)

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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