Replace 0 with 1 in multiple fields with awk

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01-27-2015

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You don't need if(i%2==0) if you do
for(i=2;i<=NF;i+=2)

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If dealing with few fields, try

Code:

awk     '!$2    {$2=1}
         !$4    {$4=1}
        1
        ' OFS="\t" file

For more/many fields, try

Code:

awk     '       {for (i=2; i<=NF; i+=2) if(!$i) {$i=1}  
                } 
          1
        ' OFS="\t" file

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