[Rd] read.table, read.fwf, and na.strings (PR#7075)

From: <rmh_at_temple.edu>
Date: Sun 11 Jul 2004 - 07:21:10 EST

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Is this intended behavior for the read.fwf(na.strings="-999")? I anticipated that the na.strings would be padded with blanks. Therefore I anticipated getting the result tmp2 from the simpler na.strings in the tmp1 assignment? My anticipation is based on the documentation that says
"Blank fields are also considered to be missing values."

> na.strings: a vector of strings which are to be interpreted as 'NA'
> values. Blank fields are also considered to be missing
> values.

temp.dat



123456-999 01234
56-9990123412345

read.fwf.test.r



tmp1 <- read.fwf("temp.dat",
                 na.strings="-999",
                 col.names=LETTERS[1:4],
                 widths=c(2,4,5,5))

tmp1
tmp2 <- read.fwf("temp.dat",
                 na.strings=c("-999","-999 "),
                 col.names=LETTERS[1:4],
                 widths=c(2,4,5,5))

tmp2

> tmp1

   A B C D
1 12 3456 -999 1234
2 56 NA 1234 12345
> tmp2

   A B C D
1 12 3456 NA 1234
2 56 NA 1234 12345

--please do not edit the information below--

Version:
 platform = i386-pc-mingw32
 arch = i386
 os = mingw32
 system = i386, mingw32
 status =
 major = 1
 minor = 9.1
 year = 2004
 month = 06
 day = 21
 language = R

Windows XP Home Edition (build 2600) Service Pack 1.0

Search Path:
 .GlobalEnv, file:c:/HOME/rmh/hh/splus.library/HH/.RData, package:methods, package:stats, package:utils, package:multcomp, package:mvtnorm, package:abind, package:graphics, package:lattice, package:grid, Autoloads, package:base



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https://www.stat.math.ethz.ch/mailman/listinfo/r-devel Received on Sun Jul 11 07:26:26 2004

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