grep, etc

[Fairlight]

The honourable and venerable Robert Pulliam M.D. spoke thus:
>     I have created a file using the export commant in filepro.  It is text with a newline record seperator.  the file looks like this:
> 
> ISA*00000089** *
> CLM*inv123456*a*b*c         -213
> SV1*23456*25*A*B            -214
> 
> i WANT TO BE ABLE TO VIEW A RANGE OF LINE USING GREP, MORE OR AWK.   IS THIS POSSIBLE.   IE FROM -213 TO -216

No, but you can view a range like this:

tail +213 filename |head -4

That would give you 213-216.

Now if you need to always view the same window size but the specific data
starts in one place and you need to combine grep's functionality with
multi-line views, you could try something like:

tail +`grep -n unique_pattern /path/to/data |awk -F: '{print $1}' |head -1` \
/path/to/data | head -5

The nested `head -1` makes sure you only get -one- result from the
grep--the very first one, if the pattern isn't unique.  Technically you
should be using something unique, but if you don't by accident, this will
prevent it from acting oddly.

mark->.
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