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sed variable expansion fails for substitution in range

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# 1  
Old 02-24-2014
sed variable expansion fails for substitution in range
I'm trying to change "F" to "G" in lines after the first one:
Code:
'FUE.SER' 5
 1  1             F0501 F0401 F0502
 2  1       F0301 E0501 F0201 E0502 F0302
 3  1 F0503 E0503 E0301 E0201 E0302 E0504 F0504
 4  1 F0402 F0202 E0202 F0101 E0203 F0203 F0403
 5  1 F0505 E0505 E0303 E0204 E0304 E0506 F0506
 6  1       F0303 E0507 F0204 E0508 F0304
 7  1             F0507 F0404 F0508
 0  0

This is the desired end state:
Code:
'FUE.SER' 5
 1  1             G0501 G0401 G0502
 2  1       G0301 E0501 G0201 E0502 G0302
 3  1 G0503 E0503 E0301 E0201 E0302 E0504 G0504
 4  1 G0402 G0202 E0202 G0101 E0203 G0203 G0403
 5  1 G0505 E0505 E0303 E0204 E0304 E0506 G0506
 6  1       G0303 E0507 G0204 E0508 G0304
 7  1             G0507 G0404 G0508
 0  0

Here's the script:

Code:
#!/bin/sh -xv
AAA=G
sed -e '/FUE\.SER/,/0  0/ {/FUE\.SER/b; s/F/'$AAA'/g;}'

Here's the output:

Code:
'FUE.SER' 5
0502 G            G
0302 E0502 GG
0504 E0503 E0301 E0201 E0302 E0504 G
0403 G0203 G
0506 E0505 E0303 E0204 E0304 E0506 G
0304 E0508 GG
0508 G            G
 0  0

I've tried several different quote schemes but can't seem to get $AAA to substitute correctly. Anyone have any suggestions?
Thanks,
Larry
Last edited by Don Cragun; 02-24-2014 at 01:57 AM.. Reason: Add CODE tags.
# 2  
Old 02-24-2014
Like this?
Code:
AAA=G
sed "2,$ s/F/$AAA/g" infile

--ahamed
Last edited by ahamed101; 02-24-2014 at 02:03 AM..
# 3  
Old 02-24-2014
Hi ahamed,
Yes, like that. But the range is in the middle of a file of hundreds of lines. So, I need the range construction.
Code:
/FUE\.SER/,/0  0/

And, I don't want to modify the line
Code:
'FUE.SER' 5

Eventually, I want to increment the AAA variable. So, I want to pass that variable to the sed substitution. But, I can't seem to get the behavior that I want.
Thanks,
Larry
Last edited by Don Cragun; 02-24-2014 at 03:05 AM.. Reason: Add CODE and ICODE tags.
# 4  
Old 02-24-2014
I didn't quite understand about incrementing the AAA variable. May be you should provide more input with desired output.

This has the range in place.
Code:
AAA=G
sed "/'FUE.SER' 5/,/ 0  0/ {/FUE.SER/{n}; s/F/$AAA/g}" infile

--ahamed
# 5  
Old 02-24-2014
when I try your suggestion, I get the result:
Code:
'FUE.SER' 5
0502 G            G
0302 E0502 GG
0504 E0503 E0301 E0201 E0302 E0504 G
0403 G0203 G
0506 E0505 E0303 E0204 E0304 E0506 G
0304 E0508 GG
0508 G            G
 0  0

As for incrementing, the goal is to increment AAA each cycle. Initially it is 'F'. Next I want to to increment it to 'G', next time to 'H',the 'I', etc. Does that help?
Last edited by Don Cragun; 02-24-2014 at 03:06 AM.. Reason: Add CODE and ICODE tags.
# 6  
Old 02-24-2014
this is what I get
Code:
root@maximus:/tmp# AAA=G
root@maximus:/tmp# sed "/'FUE.SER' 5/,/ 0  0/ {/FUE.SER/{n}; s/F/$AAA/g}" infile
'FUE.SER' 5
 1  1             G0501 G0401 G0502
 2  1       G0301 E0501 G0201 E0502 G0302
 3  1 G0503 E0503 E0301 E0201 E0302 E0504 G0504
 4  1 G0402 G0202 E0202 G0101 E0203 G0203 G0403
 5  1 G0505 E0505 E0303 E0204 E0304 E0506 G0506
 6  1       G0303 E0507 G0204 E0508 G0304
 7  1             G0507 G0404 G0508
 0  0

--ahamed

---------- Post updated at 10:31 PM ---------- Previous update was at 10:29 PM ----------

Which is your OS? Paste the exact command you are using, copy paste it please.

--ahamed
# 7  
Old 02-24-2014
The commands are in a file called 't3'. Here's the contents:
Code:
#!/bin/sh -xv
AAA=G
sed "/'FUE.SER' 5/,/ 0  0/ {/FUE.SER/{n}; s/F/$AAA/g}"

I invoke it like this:
Code:
./t3 <input

I'm running Cygwin64 in Windows 7. Could that be my problem?
Last edited by Don Cragun; 02-24-2014 at 03:08 AM.. Reason: Add CODE tags.
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