Shell Programming and Scripting

Originally Posted by alister

Hi, malcomeex999:

That tweak is incorrect, if I understand the modification to f2 correctly. If the second field is greater than the third, then it instead of being treated as the beginning index of the substring, it should be considered the end index (and the interpretation of the third field should be complementarily swapped). The correct solution requires that the second argument to substr() be modified as well, since in the case of $2 > $3, it should be $3 not $2.

By the way, malcomeex999 and rdcwayx, thank you very much for your bit awards. It's appreciated


Hi, patrick87:

One solution to handle both cases (even if they appear within the same file2):

Code:

awk 'FNR==NR {if (/^>/) p=substr($0,2); else a[p]=a[p] $0; next}
     {if ($2>$3) {t=$2; $2=$3; $3=t}; printf(">%s_0.%02u\n%s\n", $1, ++i[$1], substr(a[$1], $2, $3-$2+1))}' f1 f2

It works identically to my earlier solution except that it tests the second and third fields in f2. If the first index is greater than the second, their values are swapped before the substr() call.

Regards,
Alister

Originally Posted by patrick87

How I can edit the awk code that you suggested to give the same output result as above?