extract numbers from a word

systemali · #1 (**permalink**) 03-20-2006

Hi ppl,

I am a bit lost on this...can some one assist. I know this can be down with awk or sed, but i cant get the exact syntax right.

I need to only extract the numbers from a signle word ( eg abcd.123.xyz )

How can i extract 123 only ?

Thanks

new2ss · #2 (**permalink**) 03-20-2006

Hi,
i am assuming u have a file containing the strings and each string is uniform as below:

ccc.nnn.ccc #where c is alphabet, n is number

Code:

nawk -F. '{print $2}' filename
or
$number = `echo line | nawk -F. '{print $2}' ` #not sure if this will work
echo $number

Ygor · #3 (**permalink**) 03-20-2006

Try...

Code:

echo "abcd.123.xyz" | tr -dc '[0-9]'

systemali · #4 (**permalink**) 03-20-2006

Hi Yogr,

Thank you so much, That worked

Thank u so much.

systemali · #5 (**permalink**) 03-20-2006

But there is a problem

What if the file name is "ab42.1.2.3.tar.gz"

I only need to extract "1.2.3", but as of now it is reading "42.123" any help on that?

Thanks

matrixmadhan · #6 (**permalink**) 03-20-2006

try this,

Code:

echo ab42.1.2.3.tar.gz | sed -e 's/^[a-z]*[0-9]*.//;s/.tar.gz//'

systemali · #7 (**permalink**) 03-20-2006

that worked like a gem. Thank u so much.

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