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awk to transpose every 7 rows into columns

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# 1  
Old 01-08-2014
awk to transpose every 7 rows into columns
input:

Code:
a1
a2
a3
a4
a5
a6
a7
b1
b2
b3
..
b7
..
z1
..
z7

Desired Output:
Code:
a1 a2 a3 a4 a5 a6 a7
b1 b2 b3 ............ b7
...
z1 ..................... z7

In need of help from Gurus to transpose every 7 rows into column fields. Thanking you in advance.
# 2  
Old 01-08-2014
Code:
awk 'ORS=NR%7?FS:RS' infile

This User Gave Thanks to radoulov For This Post:
ux4me
# 3  
Old 01-08-2014
works perfectly.. Smilie

i tried this but no luck:
Code:
awk 'NR==7{a=$1;next}{a=a$1" "}END{print a}'

# 4  
Old 01-08-2014
Hm ..., it should be something like this:
Code:
awk '{
  r = length(r) ? r OFS $0 : $0 
  }  
!(NR % 7) {
  print r
  r = x
  }' infile

This User Gave Thanks to radoulov For This Post:
ux4me
# 5  
Old 01-08-2014
Your 1-liner works perfectly!
Code:
awk 'ORS=NR%7?FS:RS' infile

I was simply trying to understand how the NR thingy works.. Thanks again!
# 6  
Old 01-08-2014
I've understood, the second one just somehow follows your style.
# 7  
Old 01-08-2014
Quote:
Originally Posted by ux4me
Your 1-liner works perfectly!
Code:
awk 'ORS=NR%7?FS:RS' infile

I was simply trying to understand how the NR thingy works.. Thanks again!
Consider the following:
Code:
zsh-5.0.0[t]% cat infile 
a1
a2
a3
a4
a5
a6
a7
b1
b2
b3
b4
b5
b6
b7
z1
z2
z3
z4
z5
z6
z7

Code:
zsh-5.0.0[t]% awk '{ 
  printf "NR is %d, NR % 7 returns %d <--%s\n", 
    NR, NR % 7, NR % 7 ? " true" : "-- false" 
    }' infile
NR is 1, NR % 7 returns 1 <-- true
NR is 2, NR % 7 returns 2 <-- true
NR is 3, NR % 7 returns 3 <-- true
NR is 4, NR % 7 returns 4 <-- true
NR is 5, NR % 7 returns 5 <-- true
NR is 6, NR % 7 returns 6 <-- true
NR is 7, NR % 7 returns 0 <---- false
NR is 8, NR % 7 returns 1 <-- true
NR is 9, NR % 7 returns 2 <-- true
NR is 10, NR % 7 returns 3 <-- true
NR is 11, NR % 7 returns 4 <-- true
NR is 12, NR % 7 returns 5 <-- true
NR is 13, NR % 7 returns 6 <-- true
NR is 14, NR % 7 returns 0 <---- false
NR is 15, NR % 7 returns 1 <-- true
NR is 16, NR % 7 returns 2 <-- true
NR is 17, NR % 7 returns 3 <-- true
NR is 18, NR % 7 returns 4 <-- true
NR is 19, NR % 7 returns 5 <-- true
NR is 20, NR % 7 returns 6 <-- true
NR is 21, NR % 7 returns 0 <---- false

NR is the number of the current record.
So we manipulate the builtin variable ORS (the Output Record Separator).
When the expression returns 0, false, we set it to the default value of RS (input Record Separator): a newline,
otherwise, we set it to the current (in this case, the default) value
of FS (Field Separator) - a single space.
Last edited by radoulov; 01-08-2014 at 06:33 PM..
This User Gave Thanks to radoulov For This Post:
ux4me
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