AWK 根据其他列的 if else 写入新列

Question

I have a CSV file with columns A,B,C,D. Column D contains values on a scale of 0 to 1. I want to use AWK to write to a new column E base in values in column D.

For example:
if value in column D <0.7, value in column E = 0.
if value in column D>=0.7, value in column E =1.

I am able to print the output of column E but not sure how to write it to a new column. Its possible to write the output of my code to a new file then paste it back to the old file but i was wondering if there was a more efficient way. Here is my code:

awk -F"," 'NR>1 {if ($3>=0.7) $4= "1"; else if ($3<0.7) $4= "0"; print $4;}' test_file.csv

Answer 1

下面的 awk 命令应该给你预期的输出

cat yourfile.csv|awk -F "," '{if($4>=0.7)print $0",1";else if($4<0.7)print $0",0"}' > test_file.csv

Answer 2

您可以使用：

awk -F, 'NR>1 {$0 = $0 FS (($4 >= 0.7) ? 1 : 0)} 1' test_file.csv