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Concentrating proceeding lines with awk

 
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# 1  
Old 03-03-2011
Concentrating proceeding lines with awk
Hello,

If want to concentrate each line with the proceeding line while going over all of the lines in a document using awk. For example:

AB
CD
EF

result:
ABCD
CDEF

Any idea?Smilie
# 2  
Old 03-03-2011
Code:
{ read a ; while read b;do printf "%s\n" $a$b ; a=$b;done } <infile

Last edited by ctsgnb; 03-03-2011 at 03:14 PM..
# 3  
Old 03-03-2011
syntax error
Thanks, but it tells me there is syntax error for some reason..Smilie
# 4  
Old 03-03-2011
Should have a space after the the {

show me what you typed and what error message you get

---------- Post updated at 08:20 PM ---------- Previous update was at 08:19 PM ----------

Code:
# cat tst2
AB
CD
EF

Code:
# { read a; while read b;do printf "%s\n" $a$b ; a=$b;done } <tst2
ABCD
CDEF
#

# 5  
Old 03-03-2011
Code:
awk '{a[NR+1]=$0}NR>1{print a[NR]a[NR+1]}' file

# 6  
Old 03-03-2011
Try...
Code:
awk 'NR>1{print p $0}{p=$0}' file

# 7  
Old 03-06-2011
Thanks to all of you
 
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