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Full Discussion: Search for columns with numbers greater than 70
Top Forums UNIX for Advanced & Expert Users Search for columns with numbers greater than 70 Post 303037462 by Don Cragun on Thursday 1st of August 2019 10:28:19 PM
Old 08-01-2019
Quote:
Originally Posted by rdrtx1
Code:
awk '/dev/ && $5 ~ /[7-9][1-9]%/' infile

Hi rdrtx1,
Unfortunately, the above script won't match 80%, 90%, or 100%. One could use:
Code:
awk '/dev/ && $5 ~ /([7-9][1-9]|(8|9|10)0)%/' infile

but I find the suggestions provided by RavinderSingh13 and MadeInGermany easier to read.

I don't know of any versions of awk written since 1980 that won't accept $5+0 to strip off the trailing percent sign and then perform a numeric comparison (as required by the standards), but if you run into an awk that doesn't handle that correctly, MadeInGermany's approach will handle those cases while Ravinder's approach won't. I don't remember for sure whether or not the original awk written in the 1970's by Aho, Weinberg, and Kernighan handled this case or not; but I thought it did.
These 2 Users Gave Thanks to Don Cragun For This Post:
cokedude RavinderSingh13
 

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LEARN ABOUT LINUX

colrm

COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME

     colrm -- remove columns from a file

SYNOPSIS

     colrm [start [stop]]

DESCRIPTION

     The colrm utility removes selected columns from the lines of a file.  A column is defined as a single character in a line.  Input is read
     from the standard input.  Output is written to the standard output.

     If only the start column is specified, columns numbered less than the start column will be written.  If both start and stop columns are spec-
     ified, columns numbered less than the start column or greater than the stop column will be written.  Column numbering starts with one, not
     zero.

     Tab characters increment the column count to the next multiple of eight.  Backspace characters decrement the column count by one.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7).

EXIT STATUS

     The colrm utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     awk(1), column(1), cut(1), paste(1)

HISTORY

     The colrm command appeared in 3.0BSD.

BSD
								  August 4, 2004							       BSD
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