Pattern Deletion 1

[ng1]

I want to find a pattern. Then I want to compare string 4 of the line with the pattern in it to string 4 of the line above it. If those 2 strings match, I want to delete both lines.

I know this will delete line with pattern and line above but I don't know how to add the step of matching up string 4.

awk ‘ /UNDO/{x=””;next}
{if(x)print x;x=$0}
END{if(x)print x} ‘ FILE

 

[PHV]

Typed, untested:

awk '/UNDO/&&s4==$4{x="";next}
{if(x)print x;x=$0;s4=$4}
END{if(x)print x}' FILE

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[ng1]

Thanks PHV. I am checking it out right now.

 

[ng1]

Works like a charm!! Thanks again!