[R] detecting blanks in read.table()

[Peter Dalgaard BSA]

Laura Forsberg <toad at alvie-mail.lanl.gov> writes:

> Hi everyone,
> 
> I am trying to read in a tab delimited data file to R that has outliers
> marked by blank spaces.  I would like to be able to tag those as "NA"
> when the data is read in.  I cannot figure out how to do this using the
> read.table() options.  Everything I have tried either puts all the NA on
> the end of the row when there are missing values instead of on their
> appropiate columns or won't read the data in at all.
> 
> Thanks much,
> 
> Laura

Blank or empty? Using read.delim() or read.table(...,sep="\t") should
at least get the columns right. You might need na.strings=" " to
prevent it from interpreting the entire column as a factor.

-- 
   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
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._