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# 1  
Old 10-24-2001
Question cut

How to use cut when your delimeter is either space (could be one or more) or tab.

example :-
See the data below.

Code:
A                       B                            C
                         E                            F

The first column of the second row is blank (NULL).

say, I want to cut the second field. The fields are seprated by either one or more blank space or one or more tab.

Do, I have use tr command first on the file and then pass the result to the cut command or there is any easy way in cut command itself.

Thanks
Sanjay


Last edited by sanjay92; 10-24-2001 at 02:24 AM..
sanjay92
# 2  
Old 10-24-2001
Personally, I would try to use awk instead of cut, especially if the data in the columns ins't lined up. If the data is lined up, why not just use cut -c?
# 3  
Old 10-24-2001
I agree, awk would be the way to go:

awk '{print $2 }' file1 > file2

this will pull out your column B from file1 and put it into file2
(for other columns, change the $2 to what ever column # you need. (you can even pull multiple columms

If this won't work, and you still need to use cut, you can replace the spaces with a comma, or what ever delimiter you need.

Search & Replace in VI

in vi type

:%s/ /,/g This will replace all tabs with a comma

to replace multiple spaces, or multiple tabs, just put the number of spaces or tabs in the first part of the search & replace


RECON
# 4  
Old 10-24-2001
Thanks Guys,
I guess awk command will not work perfectly here.

cat y | awk '{ print $2 }'

where y is

Code:
A       B       C
         D       E

the output is B and E, what I want is B and D.
You are right that cut -c will work perfect , If positions are known.
sanjay92
# 5  
Old 10-24-2001
Re: cut

Quote:
Originally posted by sanjay92
How to use cut when your delimeter is either space (could be one or more) or tab.
Change the delimiter to be a single tab. Then use cut. Below, where I type TAB, hit your TAB key.

sed 's/[ TAB][ TAB]*/TAB/g' | cut -f1-2
# 6  
Old 10-24-2001
You can still use awk, you just need the -F option. awk -F\t '{print $2}' will give you the second column if it is truely tab delimited.
# 7  
Old 10-24-2001
Thanks guys.
sanjay92
 

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