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Shell Programming and Scripting

getting value from field dynamically

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# 8  
Old 05-20-2008
I try to do this
Quote:
echo $line|cut -d " " -f$lessOneWordOfVessel-$totalWordOfVessel
but it says cannot cut 11

i check, but there's 11 word after cutting out the " " delimiter
# 9  
Old 05-20-2008
Are there spaces in $lessOneWordOfVessel and/or $totalWordOfVessel? How are you calculating them?

Code:
vnix$ echo "foo bar baz quux" | cut -d " " -f1 -2  # space after 1
cut: invalid option -- 2
Try `cut --help' for more information.
-bash: echo: write error: Broken pipe
vnix$ echo "foo bar baz quux" | cut -d " " -f1- 2  # space before 2
cut: 2: No such file or directory
-bash: echo: write error: Broken pipe
vnix$ echo "foo bar baz quux" | cut -d " " -f1-2  # no spaces
foo bar

# 10  
Old 05-20-2008
i want to cut the last two fields of the line

the line has 11 fields after the delimiter
so in actual fact i trying to cut 10th and 11th field of the line
# 11  
Old 05-20-2008
So do the variables really contain just the numbers 10 or 11, or can there be spaces on either side? If you have spaces there, it will not work.
# 12  
Old 05-20-2008
Code:
BUNGA TERATAI 3    5055     ITH      1     0     0     0     1     1

this is what i want to extract out, i want the value at the last two fields

i can't really test the variable, since it give me error in the first place
# 13  
Old 05-20-2008
Code:
awk '{ print $(NF-1), $NF }' file

You can inspect the value of all variables with set; usually you can also use echo regardless of what the variable contains, although you should be aware that some versions of echo will not print the raw string exactly (there's backslash escaping, etc.) and of course, you have to quote it properly to see whether or not there's any whitespace there.
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