CODEWITHSUNDEEP
awkfilterheader
fibar
fibar

Reputation: 179

Filter file with awk and keep header in output

I have following CSV file:

a,b,c,d
x,1,1,1
y,1,1,0
z,1,0,0

I want to keep lines that add up more than 1, so I execute this awk command:

awk -F "," 'NR > 1{s=0; for (i=2;i<=NF;i++) s+=$i; if (s>1)print}' file

And obtain this:

x,1,1,1
y,1,1,0

How can I do the same but retain the first line (header)?

Upvotes: 6

Views: 10686

Answers (2)

James Brown
James Brown

Reputation: 37404

Since it's only 0s and 1s:

$ awk 'NR==1 || gsub(/1/, "1") > 1' file
a,b,c,d
x,1,1,1
y,1,1,0

Upvotes: 1

jas
jas

Reputation: 10865

$ awk -F "," 'NR==1; NR > 1{s=0; for (i=2;i<=NF;i++) s+=$i; if (s>1)print}' file
a,b,c,d
x,1,1,1
y,1,1,0

Upvotes: 13

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