[Rd] re ad.spss (foreign) conflict with SPSS 17 files.

[Jeroen Ooms]

SPSS seems to have changed its default datafile format, resulting in issues
for read.spss(). In Windows this results in a warning, in Debian the import
completely fails:

Debian (R version 2.8.0 (2008-10-20) i486-pc-linux-gnu, foreign_0.8-29)

> read.spss("/home/jeroen/samples/Tomato.sav")
Error in iconv(names(rval), cp, "") :
  unsupported conversion from 'CP65001' to ''
In addition: Warning messages:
1: In read.spss("/home/jeroen/samples/Tomato.sav") :
  /home/jeroen/samples/Tomato.sav: File-indicated character representation
code (65001) looks like a Windows codepage
2: In read.spss("/home/jeroen/samples/Tomato.sav") :
  /home/jeroen/samples/Tomato.sav: Unrecognized record type 7, subtype 20
encountered in system file
>


windows (R version 2.8.0 (2008-10-20), foreign_0.8-29)

> read.spss("C:/Program
> Files/SPSSInc/Statistics17/Samples/English/Tomato.sav")

...
 
attr(,"codepage")
[1] 65001

Warning messages:
1: In read.spss("C:/Program
Files/SPSSInc/Statistics17/Samples/English/Tomato.sav") :
  C:/Program Files/SPSSInc/Statistics17/Samples/English/Tomato.sav:
File-indicated character representation code (65001) looks like a Windows
codepage
2: In read.spss("C:/Program
Files/SPSSInc/Statistics17/Samples/English/Tomato.sav") :
  C:/Program Files/SPSSInc/Statistics17/Samples/English/Tomato.sav:
Unrecognized record type 7, subtype 20 encountered in system file


I've share some sample datafiles that are included with SPSS, so you can
take a look: http://jeroen.xlshosting.net/samples/
I hope there is a fix, I think importing data from SPSS is a very popular
feature. 

Thank you!
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