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Update column in File

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# 1  
Old 08-22-2012
Update column in File
I Have a file a.txt in the below format
Code:
1 23 50
1 25 6666666666666
1 23 34

If the third column value is greater than two digit then make it 0

Code:
New Data File
---------------
a.txt
1 23 50
1 25 0
1 23 34

Need your help regarding this
Last edited by vbe; 08-22-2012 at 01:30 PM.. Reason: Its square brakets for code tags! Nice try ...
# 2  
Old 08-22-2012
Code:
awk '$3 > 99 {$3=0}'1 file

# 3  
Old 08-22-2012
Using some posixsh (ksh, bash, dash ...)
Code:
while read a1 a2 a3 x
do
        ((a3<100)) && echo "$a1 $a2 $a3" && continue
        echo "$a1 $a2 0"
done < a.txt

Or if file is big, then awk is better - faster.
Code:
awk '
{       if ($3>99) $3=0
        print
}' a.txt
# or
awk '
$3 > 99 { $3=0  }
        { print }
' a.txt

# 4  
Old 08-29-2012
Smilie
Code:
awk '$3 > 99 {$3=0}'1 file

This Works fine .Can you please explain what is this 1
Last edited by Franklin52; 08-30-2012 at 04:32 AM.. Reason: Please use code tags for data and code samples
# 5  
Old 08-30-2012
Quote:
Originally Posted by deep_kol
Smilie
awk '$3 > 99 {$3=0}'1 file

This Works fine .Can you please explain what is this 1
1 => Print line being read
# 6  
Old 08-30-2012
Code:
awk '(length($3)>2){$3=0}'1 filename

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