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Separate letters and replace whitespaces

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# 1  
Old 06-16-2013
Separate letters and replace whitespaces
Input file:
Code:
aaaa bbb dd.
qqq wwww e.

Output file:
Code:
a a a a <s> b b b <s> d d .
q q q <s> w w w w <s> e .

Can I use sed to do so in one step?
# 2  
Old 06-16-2013
Code:
awk  '{for(i=1;i<=NF;i++) printf "%s ",$i; print ""}' FS="" infile
a a a a   b b b   d d .
q q q   w w w w   e .

# 3  
Old 06-16-2013
Thanks!
But how can I also add <s> in the previously existing spaces?
# 4  
Old 06-16-2013
Code:
awk  '{a="";for(i=1;i<=NF;i++) a=a sprintf("%s ",$i);gsub(/   /," <s> ",a);print a}' FS=""
a a a a <s> b b b <s> d d .
q q q <s> w w w w <s> e .

I thought the <s> was representing space, but this fix it.
# 5  
Old 06-16-2013
Code:
sed 's/./& /g; s/[[:blank:]]\{2,\}/ <s> /g'

Without an extra space at the end:
Code:
sed 's/./& /g; s/[[:blank:]]\{2,\}/ <s> /g; s/ $//'

Last edited by MadeInGermany; 06-16-2013 at 08:31 AM..
# 6  
Old 06-16-2013
Based on MadeInGermany sed you can tweak my regex some Smilie
Did forget the nice &
Code:
awk '{gsub(/./,"& ");gsub(/   /," <s> ")}1'

If you like to remove the extra space added after final letter . in all example above add $1=$1
Code:
awk  '{gsub(/./,"& ");gsub(/   /," <s> ");$1=$1}1'

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