
R version 4.3.0 (2023-04-21) -- "Already Tomorrow"
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> library(gdata)

Attaching package: 'gdata'

The following object is masked from 'package:stats':

    nobs

The following object is masked from 'package:utils':

    object.size

The following object is masked from 'package:base':

    startsWith

> saveto <- tempfile(pattern = "test.txt", tmpdir = tempdir())
> 
> write.fwf(x = data.frame(a=1:length(LETTERS), b=LETTERS),
+           file=saveto, eol="\r\n")
> 
> proc.time()
   user  system elapsed 
  0.088   0.008   0.093 
