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Need help on find and replacement on specific line and position

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Top Forums Shell Programming and Scripting Need help on find and replacement on specific line and position
# 29  
Old 01-29-2014
Quote:
Originally Posted by Chubler_XL
This should match on field three, notice how if matching the "*" (star) character two backquotes are needed.

The star on the end is to match with the rest of the string so example is looking for any field 3 that starts with "NM1*IL*1"

Code:
k3='NM1\\*IL\\*1*'
awk -v k3="$k3" '
    BEGIN{
      F="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
      T="ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba9876543210"
      for(i=1;i<=length(F);i++)N[substr(F,i,1)]=substr(T,i,1);
    }
    $3 ~ k3 {
      out=x
      for(i=1;i<=length($3);i++) {
         c=substr($3,i,1)
         out=out (i>9&&(c in N)?N[c]:c)
      }
      $3=out
    }
    1
' $file

sorry i gave wrong information.. here it is i wanted.. please refer the updated one

i don't have any issue with the above code. is it possible to make the above code work on single field .. say field $3 .. first it has to search a specific field ($3) . in field # 3, it has to replace from 9 th position to end of the field ...

first i need to locate the field i want ,.. it could be field #3 or 4 or 5 or anything
then on the located field .. i need to replace from start position to end postion.. say 9 to 12 or 5 to end of that that specific field
# 30  
Old 01-29-2014
You have changed your requirements so many times that I have absolutely no idea what you want to do. Please give us a complete set of requirements.

Are we processing a single line in a file or every line in a file? If it is a single line, how do we identify which line you want to process? If some lines are not to be processed, are they copied unchanged from the input to the output, or are they removed from the output?

What constitutes a field?

Are you trying to change data from a certain point in a field to the end of that field, to the end of that line, for some number of characters in that field, or for some number of characters in that line?
This User Gave Thanks to Don Cragun For This Post:
Rajesh_us
# 31  
Old 01-29-2014
Quote:
Originally Posted by Don Cragun
You have changed your requirements so many times that I have absolutely no idea what you want to do. Please give us a complete set of requirements.

Are we processing a single line in a file or every line in a file? If it is a single line, how do we identify which line you want to process? If some lines are not to be processed, are they copied unchanged from the input to the output, or are they removed from the output?

What constitutes a field?

Are you trying to change data from a certain point in a field to the end of that field, to the end of that line, for some number of characters in that field, or for some number of characters in that line?

Sorry for inconvenience !

I will identify few lines in the file based on some predefined strings. On each identified line , I need to do manipulation on only few fields. Again within the fields, I will manipulate only on certain range of position. Yes, unprocessed input will be copied into output.

What was previous requirement

Input
Code:
NM1*IL*1*AYNCH*AILLIAM****AI*R02089540

output
Code:
NM1*IL*1*ZBMXS*ZROORZN****ZR*I97910459

After “1*” , everything is manipulated

What is current requirement

Example 1

input
Code:
NM1*IL*1*AYNCH*AILLIAM****AI*R02089540

output
Code:
NM1*IL*1*AYNCH*ZROOIAM****AI*R02080540

On fifth field from 1(A) to 4 (L) needs to be converted

Example 2

Input
Code:
NM1*IL*1*AYNCH*AILLIAM****AI*R02089540

ouput
Code:
NM1*IL*1*AYNCH*ZROORZN****AI*R02080540

On fifth field I'm converting everything.
# 32  
Old 01-29-2014
Looks like some more flexibility in the code could help you change things to get what you require.

Start with this for example 2 (Change all of field 5):

Code:
awk -F\* '
function rot(string,start,end,i,ret) {
   if(!end) end=length(string);
   if(!start) start=1;
   for(i=start;i<=length(string);i++) {
        c=substr(string,i,1)
        ret=ret (i>=start&&i<=end&&(c in N)?N[c]:c)
   }
   return ret
}
BEGIN{
    OFS=FS
    F="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
    T="ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba9876543210"
    for(i=1;i<=length(F);i++)N[substr(F,i,1)]=substr(T,i,1);
}

{ $5=rot($5) } 1 ' $file

Change to this for example 1 (chars 1-4 of field 5):
Code:
awk -F\* '
function rot(string,start,end,i,ret) {
   if(!end) end=length(string);
   if(!start) start=1;
   for(i=start;i<=length(string);i++) {
        c=substr(string,i,1)
        ret=ret (i>=start&&i<=end&&(c in N)?N[c]:c)
   }
   return ret
}
BEGIN{
    OFS=FS
    F="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
    T="ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba9876543210"
    for(i=1;i<=length(F);i++)N[substr(F,i,1)]=substr(T,i,1);
}

{ $5=rot($5,1,4) } 1 ' $file

This User Gave Thanks to Chubler_XL For This Post:
Rajesh_us
# 33  
Old 01-29-2014
where should i include the line number ?? i need to

Something like this

Code:
 NR == k3

or

Code:
k3='NM1\\*IL\\*1*'
awk -v k3="$k3" '


and i tried to running the above command with line numbers in it ( im not sure i did correct). Here is the content from terminal

Code:
+ awk '-F*' k3=19 '
function rot(string,start,end,i,ret) NR == k3 {
   if(!end) end=length(string);
   if(!start) start=1;
   for(i=start;i<=length(string);i++) {
        c=substr(string,i,1)
        ret=ret (i>=start&&i<=end&&(c in N)?N[c]:c)
   }
   return ret
}
BEGIN{
    OFS=FS
    F="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
    T="ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba9876543210"
    for(i=1;i<=length(F);i++)N[substr(F,i,1)]=substr(T,i,1);
}

{ $5=rot($5,1,5) } 1 ' Xdata_6513155487964.xml-3C488ABB-22C2-4925-A6FF-33CF6A767268.dat
awk: cmd. line:1: fatal: cannot open file `

Code what i gave

Code:
awk  -F\*  k3="$k3" '
function rot(string,start,end,i,ret) NR == k3 {
   if(!end) end=length(string);
   if(!start) start=1; 
   for(i=start;i<=length(string);i++) {
        c=substr(string,i,1)
        ret=ret (i>=start&&i<=end&&(c in N)?N[c]:c)
   }
   return ret
}
BEGIN{
    OFS=FS
    F="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
    T="ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkjihgfedcba9876543210"
    for(i=1;i<=length(F);i++)N[substr(F,i,1)]=substr(T,i,1);
}

{ $5=rot($5,1,5) } 1 ' $file

Last edited by Rajesh_us; 01-29-2014 at 11:28 PM..
# 34  
Old 01-29-2014
Like this:

Code:
k3=17
awk -F\* -v k3="$k3" '
...
NR == k3 { $5=rot($5) } 1 ' $file

or this

Code:
k3='NM1\\*IL\\*1*'
awk -F\* -v k3="$k3" '
...
$0 ~ k3 { $5=rot($5,1,4) } 1' $file

This User Gave Thanks to Chubler_XL For This Post:
Rajesh_us
# 35  
Old 01-30-2014
it works.. just thanks is not enough for u guys... for now , thanks a lot

---------- Post updated at 11:59 PM ---------- Previous update was at 10:40 PM ----------

Quote:
Originally Posted by Chubler_XL
Like this:

Code:
k3=17
awk -F\* -v k3="$k3" '
...
NR == k3 { $5=rot($5) } 1 ' $file

or this

Code:
k3='NM1\\*IL\\*1*'
awk -F\* -v k3="$k3" '
...
$0 ~ k3 { $5=rot($5,1,4) } 1' $file



i'm afraid to ask a question again. i'm not adding up any new requirements but i have few more cases (scenario). This will be my last question

Whatever you provided, its work fine

here i have two more scenario

Example 3

input

Code:
NM1*IL*1*AYNCH*AILLIAM****AI*R02089540

output

Code:
NM1*IL*1*AYNCH*AIOORZN****AI*R02080540


Example 4

input

Code:
NM1*IL*1*AYNCH*AILLIAM****AI*R02089540

output

Code:
NM1*IL*1*AYNCH*AIOOIAM****AI*R02080540
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