[R] [newbie] read row from file into vector

[Rui Barradas]

Tom Roche wrote
> 
> summary: how to read a row (not column) from a file into a vector (not a
> data frame)?
> 
> details:
> 
> I'm using
> 
> $ lsb_release -ds
> Linux Mint Debian Edition
> $ uname -rv
> 3.0.0-1-amd64 #1 SMP Sun Jul 24 02:24:44 UTC 2011
> $ R --version
> R version 2.14.1 (2011-12-22)
> 
> I'm new to R (having previously used it only for graphics), but have
> worked in many other languages. I've got a CSV file from which I'd like to
> read the values from a single *row* into a vector. E.g., for a file such
> that
> 
> $ head -n 2 ~/data/foo.csv | tail -n 1
> 5718,0.3,0.47,0,0,0,0,0,0,0,0,0.08,0.37,0,0,0.83,1.55,0,0,0,0,0,0,0,0,0,0.00,2.48,2.33,0.17,0,0,0,0,0,0,0.00,10.69,0.18,0,0,0,0
> 
> I'd like to be able to populate a vector 'v' s.t. v[1]=5718, ... v[43]=0
> 
> I can't seem to do that with, e.g., read.csv(...) or scan(...), both of
> which seem column-oriented. What am I missing?
> 
> ______________________________________________
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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.
> 

Hello,

?readLines

If you want the 2nd line it's fast, if you have a large file, cycle through.

Rui Barradas


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