csh use of grep | tr commands

[Ernie Luzar]

Double quotes are giving me trouble.

I have a file with a line in it like this
ip4="10.111.098.2"
I want to get just the ip address

ip=`grep "ip4=" directory-path/file-name

$ip ends up having ip4="10.111.098.2"  in it

ip=`echo -n "${ip}" | tr -d "ip4="

$ip ends up having "10.111.098.2"  in it

Putting | tr """ " "` after the echo above gives error.

How do I remove the " around the ip address?