'Simple' sed problem 3

[dickiebird]

Guys
I know that sed 's/.....RA...0/&K/g' < infile > outfile
will insert a K after position 11 in a record.
but I need to replace the 0 in position 11 with a K
How do I do that ?
TIA Dickie Bird (-)))

 

[kasparov]

This is a bit of a hack, but the way I do this type of thing is - first determine a character which doesn't occur anywhere in the input file (in my example a closing square bracket) then change all occurrences of '..........0' to '..........0]' & then change all occurrences of '0]' to 'K'.

(Sorry but I did say it was a hack)

Chris

 

[pavNell]

sed 's/\(.....RA...\)0/\1K/'< infile > outfile

or perhaps sed 's/0$/K/' < infile > outfile

 

[dickiebird]

Chris - the hack works fine - but you'll agree that Pavnell's solution is neat !
Thanks Guys, for your prompt responses. Dickie Bird (-)))

 

[kasparov]

Certainly do - I always forget that you can refer to previous string values in sed.