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Shell Programming and Scripting

how to print field n of line m

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# 1  
Old 10-13-2008
Question how to print field n of line m
Hi everyone, I have a basic csh/awk question.

How do I print a given field from a given line in a given file?

Thanks in advance!
# 2  
Old 10-13-2008
Code:
awk 'NR==given_line{print $given_field}' given_file

Regards
# 3  
Old 10-13-2008
^^^^You missed the given field separator Smilie
# 4  
Old 10-13-2008
thanks franklin! will try it!

oh im using the default field separator (space) Smilie
# 5  
Old 01-14-2009
Hmmm, can someone help me why it doesnt work when i use a variable for the "given_line", eg:

awk 'NR==$counter{print $25}' $argv[1]

thanks in advance!
# 6  
Old 01-14-2009
Quote:
Originally Posted by Deanne
Hmmm, can someone help me why it doesnt work when i use a variable for the "given_line", eg:

awk 'NR==$counter{print $25}' $argv[1]

thanks in advance!
Try this:

Code:
 awk -v var=$counter 'NR==var{print $25}' $argv[1]

Regards
# 7  
Old 01-14-2009
You need to use the -v option in awk to use shell variables, as below:

Code:
awk -v c=$counter 'NR==c {print $25}' $argv[1]
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