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String manipulation row by row

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# 1  
Old 03-11-2011
String manipulation row by row
Dear masters,

I stuck again in a very tricky situation,so need your valuable inputs. I have a file [idxout.txt as attached] having rows as below:

Code:
_Db
  _Database                 1023       1      1       1   17.0B     0.2     1.0
_Field
  _Field-Name                  3       2      2      11   56.2K    64.1     2.0
  _Field-Position              4       2      2       8   35.5K    55.7     2.1
  _File/Field                  2       2      2      11   47.1K    53.7     2.1

And I want to manipulate it to something as shown below:

Code:
_Db._Database                 1023       1      1       1   17.0B     0.2     1.0
_Field._Field-Name                  3       2      2      11   56.2K    64.1     2.0
_Field._Field-Position              4       2      2       8   35.5K    55.7     2.1
_Field._File/Field                  2       2      2      11   47.1K    53.7     2.1

FYI, changes are happening only on the column-1 and the rest data will be remain unchanged. Attaching the input file[idxout.txt] and required output file[reqidxout.txt].

Thanks for your support.
idxout.txt (1.1 KB) 
reqidxout.txt (1.1 KB) 
Last edited by joeyg; 03-11-2011 at 12:39 PM.. Reason: Please use CodeTags around scripts and data
# 2  
Old 03-11-2011
Quote:
Originally Posted by patric2326
And I want to manipulate it to something as shown below:

Code:
_Db._Database                 1023       1      1       1   17.0B     0.2     1.0
_Field._Field-Name                  3       2      2      11   56.2K    64.1     2.0
_Field._Field-Position              4       2      2       8   35.5K    55.7     2.1
_Field._File/Field                  2       2      2      11   47.1K    53.7     2.1

Code:
# awk '{if(NF==1){x=$0;next};sub($1,x"."$1);sub(/[ ]+/,"")}1' file
_Db._Database                 1023       1      1       1   17.0B     0.2     1.0
_Field._Field-Name                  3       2      2      11   56.2K    64.1     2.0
_Field._Field-Position              4       2      2       8   35.5K    55.7     2.1
_Field._File/Field                  2       2      2      11   47.1K    53.7     2.1

# 3  
Old 03-11-2011
It checks to see if field 2 exists and if it doesn't, assumes field 1 is the title and stores it in H. Otherwise it adds H"." to the front of the first field and prints the whole mess.
Code:
awk '{ if(!$2) {H=$1;} else { $1=H "." $1; print $0; } }' < data
_Db._Database 1023 1 1 1 17.0B 0.2 1.0
_Field._Field-Name 3 2 2 11 56.2K 64.1 2.0
_Field._Field-Position 4 2 2 8 35.5K 55.7 2.1
_Field._File/Field 2 2 2 11 47.1K 53.7 2.1

# 4  
Old 03-11-2011
String manipulation row by row
Perfect !!!

This is exactly I was looking for.

Thanks for your quick response.

RegardsSmilie
# 5  
Old 03-14-2011
String manipulation row by row
Quote:
Hi Corona688,

Their is slight change in the "idxout.txt" file and when I executed your command I'm getting weired output. And the output I require should be something as attached "reqidxout.txt". So can you please suggest any modification in your previous command.
FYI,changes are their only on the first column.

Thanks for your support.

Regards,
idxout.txt (772 Bytes) 
reqidxout.txt (823 Bytes) 
# 6  
Old 03-14-2011
Quote:
Hi Danmero,
I tried your option also but getting the syntax error as below:

>awk '{if(NF==1){x=$0;next};sub($1,x"."$1);sub(/[ ]+/,"")}1' idxout
awk: syntax error near line 1
awk: illegal statement near line 1
awk: syntax error near line 1
awk: illegal statement near line 1
awk: syntax error near line 1
awk: bailing out near line 1
Regards,
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