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05-16-2008
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replace a newline (\n)
dear all:
maybe i have a file like : 12 34 56 78 end how do write can i replace newline into NA : make the file inte : 12 NA 34 NA 56 78 END I wrote a shell like: foreach a (fiel){ if a == "" set $a=NA } but can't work maybe someone can help me 
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05-17-2008
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using Perl:
Code:
perl -pi -e 's/^$/NA/' filename
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