help with sed

[Nils Kassube]

Joep L. Blom wrote:
> Thanks for your reply. I have made a small bash-script with it and it
> works as expected. However, I also want the first line - which has
> the headers - also changed so that the first three headers are
> change to date and the next two to time. However, the script I made
> and expected to work doesn't. The script part with your solution
> works OK. This is my script:
> _______________________________________________________________
> #!/bin/bash
> #Simple program make the first 5 fields in a .csv-file into a date
> time format
> echo "$1 en  $2"\n;
> sed -e '1,1s/day,month,year/date/' -e '1s/hour,minute/time/'
> -e '2,$s/,/-/' -e '2,$s/,/-/' -e '2,$s/,/\ /' -e '2,$s/,/:/'
> -e '2,$s/,/:0,/' $1 > $2;
> _____________________________________________________________
> It doesn't give errors but line one is not changed. Perhaps you can
> see my error? In the result file line 1 is unchanged.

Two remarks:
- I don't see a reason to use "1,1s…" for the first command, "1s…" 
should suffice.
- The backslash for the fifth command is not needed because the 
expression is now inside quotes.

But of course that doesn't explain why line 1 is unchanged. I would 
assume that the expressions you used don't match, e.g. because the 
original line uses upper case instead of the lower case in your 
expression or extra space characters somewhere. If you don't find the 
reason, could you post the original first line of the file?


Nils