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Full Discussion: Changing Line in Txt File
Top Forums Shell Programming and Scripting Changing Line in Txt File Post 302679281 by Jimmyd24 on Tuesday 31st of July 2012 11:13:52 AM
Old 07-31-2012
Changing Line in Txt File
So I have a python program that I run, which runs accordingly to options I have listed in a text file (ie user_prefs). Now there are many options listed in this user_prefs.txt, but the one of most interest to me is that of the file path of the time series.

I have over a hundred of these time series that I would like to run this python program through (which I would rather not do randomly).....My question is how could I possibly write a script a shell script to go through and just change the time series file name and then in a loop I would be running the other python program.

All the time series files have a common suffix, but just a numbered prefix, but the number are not of any pattern, rather random. (ie 843523ascii_vF.txt)

I though of trying to write a fortran program to go in and just replace that line but cant think of the way to write the prefix from the file name to inside the program.


Any help would be greatly appreciated, thanks!

---------- Post updated 07-31-12 at 11:13 AM ---------- Previous update was 07-30-12 at 03:00 PM ----------

I was thinking about possibly constructing a shell script using

Code:
sed -i "" 's/phrase/newphrase/'g' user_prefs.txt

in order to replace the file name, however, i would want the newphrase to be the filename. I know when using a fortran I could do something like

Code:
for File in *.txt (where File new phrase I would like to insert into the txt file)
do
         ./blah.o < "$File" > 
done

so would I be able to similarly do something like this for my problem.

Code:
for File in *.txt 
do
            sed -i "" 's/phrase/"$File"/'g' user_prefs.txt
done

Thanks for the help
Last edited by Scrutinizer; 07-31-2012 at 12:23 PM.. Reason: code tags
 

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LEARN ABOUT REDHAT

mac2unix

dos2unix(1)						      General Commands Manual						       dos2unix(1)

NAME

       dos2unix - DOS/MAC to UNIX text file format converter

SYNOPSYS

       dos2unix [options] [-c convmode] [-o file ...] [-n infile outfile ...]

       Options:

       [-hkqV] [--help] [--keepdate] [--quiet] [--version]

DESCRIPTION

       This manual page documents dos2unix, the program that converts plain text files in DOS/MAC format to UNIX format.

OPTIONS

       The following options are available:

       -h --help
	      Print online help.

       -k --keepdate
	      Keep the date stamp of output file same as input file.

       -q --quiet
	      Quiet mode. Suppress all warning and messages.

       -V --version
	      Prints version information.

       -c --convmode convmode
	      Sets conversion mode. Simulates dos2unix under SunOS.

       -o --oldfile file ...
	      Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used.

       -n --newfile infile outfile ...
	      New  file  mode.	Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be
	      used or you WILL lost your files.

EXAMPLES

       Get input from stdin and write output to stdout.

	      dos2unix

       Convert and replace a.txt. Convert and replace b.txt.

	      dos2unix a.txt b.txt

	      dos2unix -o a.txt b.txt

       Convert and replace a.txt in ASCII conversion mode.  Convert and replace b.txt in ISO conversion mode.  Convert	c.txt  from  Mac  to  Unix
       ascii format.

	      dos2unix a.txt -c iso b.txt

	      dos2unix -c ascii a.txt -c iso b.txt

	      dos2unix -c mac a.txt b.txt

       Convert and replace a.txt while keeping original date stamp.

	      dos2unix -k a.txt

	      dos2unix -k -o a.txt

       Convert a.txt and write to e.txt.

	      dos2unix -n a.txt e.txt

       Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt.

	      dos2unix -k -n a.txt e.txt

       Convert and replace a.txt. Convert b.txt and write to e.txt.

	      dos2unix a.txt -n b.txt e.txt

	      dos2unix -o a.txt -n b.txt e.txt

       Convert c.txt and write to e.txt. Convert and replace a.txt.  Convert and replace b.txt. Convert d.txt and write to f.txt.

	      dos2unix -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt

DIAGNOSTICS

BUGS

       The program does not work properly under MSDOS in stdio processing mode.  If you know why is that so, please tell me.

AUTHORS

       Benjamin Lin - <blin@socs.uts.edu.au>

       Bernd Johannes Wuebben (mac2unix mode) <wuebben@kde.org>

MISCELLANY

       Tested environment:

	      Linux 1.2.0 with GNU C 2.5.8

	      SunOS 4.1.3 with GNU C 2.6.3

	      MS-DOS 6.20 with Borland C++ 4.02

       Suggestions and bug reports are welcome.

SEE ALSO

       unix2dos(1) mac2unix(1)

1995.03.31							   dos2unix v3.0						       dos2unix(1)
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