Transpose an entire text file

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# 1  
Old 09-30-2009
Transpose an entire text file

Hello all,

I want to transpose the rows of a file to the columns (every characters include spaces), i.e.:

123 456


I wrote a script:
#!/bin/csh -f

set num=`cat $1 |wc -l`
echo "$num rows of $1 transposing to columns..."

if ( -f temp1 ) then
  rm temp1
  touch temp1
  touch temp1

set i=1
set j=2

while ($i <= $num)
# read a row,  transpose to a column
  sed -n "$i p" $1 | sed 's/\n*/\n/g' > temp
# merge columns in files
  paste temp$i temp > temp$j
  rm temp$i
  @ i++
  @ j++

mv temp$i $1.transposed
rm temp

echo "Done!"

It works, but the paste command has several problems:
It inserts an empty column when appends a new column;
The columns length need be the same;
And the biggest problem is since the script keeps read and write temp files, it is very slow, the files I want to transpose have tens of thousands of rows, so it takes nearly an hour to proceed large files.

Can anyone provide a better idea to me? Thanks.

Last edited by Franklin52; 09-30-2009 at 05:27 AM.. Reason: Please use code tags!
# 2  
Old 09-30-2009
Try awk
awk '{for(x=0;++x<=NF;)a[x","NR]=$x}END{for(y=0;++y<=NF;){for(z=0;++z<=NR;) printf a[y","z];print ""}}' FS= file

# 3  
Old 09-30-2009
I'm not familiar with awk, where to specify the input and output files using the script?

Originally Posted by danmero
Try awk
awk '{for(x=0;++x<=NF;)a[x","NR]=$x}END{for(y=0;++y<=NF;){for(z=0;++z<=NR;) printf a[y","z];print ""}}' FS= file

# 4  
Old 09-30-2009
Dear guys;

   This solution provided by danmero is not working on solaries were my system can't take FS="" as null value??? any exeplination please!!!

I am working on the below station type:-
SunOS server2 5.10 Generic_118833-36 sun4u sparc SUNW,Netra-210


# 5  
Old 09-30-2009
Use /usr/xpg4/bin/awk on Solaris.
# 6  
Old 09-30-2009
Originally Posted by danmero
Use /usr/xpg4/bin/awk on Solaris.
I have tried every thing (/usr/xpg4/bin/awk  & nawk) but with no output!!!!

# 7  
Old 09-30-2009
Originally Posted by ahmad.diab
I have tried every thing (/usr/xpg4/bin/awk  & nawk) but with no output!!!!

You need to change the code in order to make it work with older AWK implementations
(added max to handle variable record length).

nawk 'END {
  for (i=1; i<=max; i++)
    for (j=1; j<=NR; j++)
      printf "%s", _[j,i] (j == NR ? RS : FS)
  for (i=0; i<=length; i++) _[NR,i] = substr($0,i,1)
  max = max < length ? length : max
  }' infile

P.S. Calling length without arguments is deprecated, so it should be length($0).
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