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You have a tuple (2 items) where each is an array.

So you can loop through one of the tuple arrays for its length and just use a simple incrementing counter to output that index in each array.

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No flames,...

Try this:
while read number; do
sed -n ${number}p file1
done < file2

Simple method might be something like:


for i in `cat $file2`
do
head -$i $file1 | tail -1
done


not sure if there's a cleaner or more efficient way, though :)

Hi

Have you tried while read N;do grep -n ^$N *spec;done<list.txt yet?

hth

Try

sed 's/^/NR==/' linesfile | awk -f - datafile

Try:
awk 'NR==FNR{A[$1]; next} FNR in A' file2 file1

Please use code tags as required by forum rules!

How aboutawk '{print a<500,a++,$1/(a*1.121212121212121229e-02)}' OFMT="%.16g" file
1 0 963.7404552836596
1 1 474.1229450561879
1 2...

I'm pretty sure your construct (a<500,a++,$1/(a*1.1212121212121229e-02)) is not understood by awk. What be your intention?

Please explain in English what this awk script is supposed to do. I can make a few wild guesses, but none of them make any sense to me.

Then note that awk uses double precision floating point...

Print two integers and one floating point?
awk '{printf "%d %d %.16f\n",(a<500),a++,$1/(a*1.121212121212121229e-02)}' input.datYou get exponential notation if you change f to e.

Use awk -v option for variable assignment and use that variable instead:
awk -v I="$i" '{r=sqrt($2^2+$3^2+$4^2); if(r<=I) print r }' input.txt

awk '{for(a=0;a<$1;a++) print $2}' infile