Shell Programming and Scripting

Hi

I am trying to write a small AWK program to extract 324 lines which have a pattern in the line numbers.
For examples, I want to extract lines 2, 5, 7, 11 and lines like (2+662), (5+662), (7+662), (11+662) and (2+662+662), (5+662+662), (7+662+662), (11+662+662) and so on for 27 times from 'File1'.

I wrote a code like
awk '{NR==i; for (i=2; i<=27; i+=662) print NR} {NR==i; for (i=5; i<=27; i+=662) print NR} {NR==i; for (i=5; i<=27; i+=662) print NR} {NR==i; for (i=11; i<=27; i+=662) print NR}' File1> File2

I think there are quite some flaws in my code.....Plese help

It would help if you explicitly formalize your idea of your number sequence. 662 is not a prime number, for example. It is way to fuzzy for me to work with.

First of all, Thanks Jim for doing an effort.

Well my requirement is like this.....I want to extract lines with these file numbers of 506, 515, 527, 536 and line numbers like 1170 (506+664*1) , 1179 (515+664*1), 1191 (527+664*1), 1200 (536+664*1) and so on. The last line numbers that I require are 17770 (506+664*26), 17779 (515+664*26), 17791 (527+664*26), 17800 (536+664*26). So I want the initial line numbers to get added to 664 multiplied from 1 to upto 26.....I am trying to put this multiplying number as a counter from 1 to 26.

So I will have in my new file the lines with line numbers of
506,515,537,536,1170,1179,1191,1200,.............,17770,17779,177791 and 17800.

Thanks a lot for the efforts.

---------- Post updated at 06:22 PM ---------- Previous update was at 03:43 PM ----------

Hi TonyLawrence,

can you write down your code with all the parantheses and everything.......i guess I need to change your code for my need a little bit

I sure have to agree with Jim.

In pseudocode, is this your number sequence:

Code:

x=0
y=(2, 5, 7, 11)
while x < 81
do
for each of y
do
 print line x * 662 + y
done
x++
done

??

Code:

awk '!((NR-506)%664) ||!((NR-515)%664) ||!((NR-527)%664)||!((NR-536)%664)" File1 > File2

Hi

Please find the script and hope it may fulfill ur needs

I didn't try since i don't have that much lengthy file.please try and let me know. You may need to edit the script according to error that u will get.

#!/bin/ksh

set -x

F=506
S=515
T=527
L=536
C=664

for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
do
FN=`expr $F + $C * $i`
SN=`expr $S + $C * $i`
TN=`expr $T + $C * $i`
LN=`expr $L + $C * $i`

sed -n $FNp file1 >> file2
sed -n $SNp file1 >> file2
sed -n $TNp file1 >> file2
sed -n $LNp file1 >> file2
done

thank u