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Top Forums Shell Programming and Scripting how to extract columns from a text file Post 302191791 by ihot on Sunday 4th of May 2008 11:44:35 PM
Old 05-05-2008
cut -f will not work

Hi again,
the following will not work:
cut -f 3,9,10 -d ' ' exampldata.txt

The reason you think it works is because this website removes spaces from my rows. So let me try to post my rows again but this time I will use underscore instead of spaces

My text file actually has a lot of spaces, so the rows look like these:
Department = 1234 __________G/L Asset Acct No = 12.0000._____2/29/2008
Department = 1234___________G/L Asset Acct No = 13.0000._____3/29/2008
(again, I had to use underscore instead of spaces above because this website removes extra spaces from the rows above)


I tried to use cut -c14-18 -c37-39 textfile but "cut" would not cut multiple columns.
My final output file should look like these:
1234 12 0000 2/29/2008
1234 13 0000 3/29/2008

To rephrase my question: Is there a way to cut multiple sections from a row (so that I can paste it into another row in another file)? "cut" does not seem to allow -c of multiple columns.

Last edited by ihot; 05-05-2008 at 01:31 AM..
 

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cut(1)							      General Commands Manual							    cut(1)

Name
       cut - cut out selected fields of each line of a file

Syntax
       cut -clist [file1 file2...]
       cut -flist [-dchar] [-s] [file1 file2...]

Description
       Use  the  command to cut out columns from a table or fields from each line of a file.  The fields as specified by list can be fixed length,
       that is, character positions as on a punched card (-c option), or the length can vary from line to line and be marked with a  field  delim-
       iter character like tab (-f option).  The command can be used as a filter.  If no files are given, the standard input is used.

       Use to make horizontal ``cuts'' (by context) through a file, or to put files together in columns.  To reorder columns in a table, use and

Options
       list	   Specifies  ranges  that must be a comma-separated list of integer field numbers in increasing order.  With optional - indicates
		   ranges as in the -o option of nroff/troff for page ranges; for example, 1,4,7; 1-3,8; -5,10 (short for 1-5,10);  or	3-  (short
		   for third through last field).

       -clist	   Specifies character positions to be cut out.  For example, -c1-72 would pass the first 72 characters of each line.

       -flist	   Specifies  the  fields  to be cut out.  For example, -f1,7 copies the first and seventh field only.	Lines with no field delim-
		   iters are passed through intact (useful for table subheadings), unless -s is specified.

       -dchar	   Uses the specified character as the field delimiter.  Default is tab.  Space or other characters with special  meaning  to  the
		   shell must be quoted.  The -d option is used only in combination with the -f option, according to XPG3 and SVID2/SVID3.

       -s	   Suppresses  lines  with  no	delimiter  characters.	 Unless  specified, lines with no delimiters are passed through untouched.
		   Either the -c or -f option must be specified.

Examples
       Mapping of user IDs to names:
       cut -d: -f1,5 /etc/passwd
       To set name to the current login name for the csh shell:
       set name=`who am i | cut -f1 -d" "`
       To set name to the current login name for the sh, sh5, and ksh shells:
       name=`who am i | cut -f1 -d" "`

Diagnostics
       "line too long"	   A line can have no more than 511 characters or fields.

       "bad list for c/f option"
			   Missing -c or -f option or incorrectly specified list.  No error occurs if a line has fewer fields than the list  calls
			   for.

       "no fields"	   The list is empty.

See Also
       grep(1), paste(1)

																	    cut(1)
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