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Which shell? Try:
for((i=1;i<=200;i++))
do
echo '0.018*'$i
done

Exponentiation.

You forgot to add the numbers of the even lines. The code sould be :
sum[i]/2 ==> (sum[i] + $i)/2

awk '{sum+=$1}!(NR%2){print sum/2;sum=0}END{if(NR%2) print sum}' OFMT='%.10e' file
giving
2.0105894389e+02
4.9401600711e+01
4.6023262421e+01
-8.5584588497e+01
1.6223676923e+02
5.0666623459e+01...

Unfortunately, the script above is functionally equivalent to:
END {print $2 > "junk" }
which only writes the 2nd field from the last line in your input file into a file named junk. But, I think...

Try this:

awk -F" " '{
bucket=int($1*10+68)
v[bucket]++
l[bucket,v[bucket]]=$0
f[bucket,v[bucket]]=$2
}
END {
for(i=1;i<=137;i++) {
loutput="file_"i
...

for example :

awk '
BEGIN {sum=0;summ=0}
{
arr[NR]=$1
sum+=$1
}
END {
average=sum/NR

for (i=1;i<=NR;i++) {
summ+=(arr[i]-average)^2
}
print summ
}
' fileplease...

awk '{print "pdb_"$0".namd"}' input.txt

There are some very well educated people who post on this site. Personally I have never heard of this product. Please post what hardware, Operating System and relevant package software you are...

[/tmp] awk '{nm=sqrt(($1*$1)+($2*$2)+($3*$3)); print $1/nm FS $2/nm FS $3/nm}' file
-0.273 -0.919946 -0.281371
-0.600509 -0.770732 -0.212982
-0.429911 -0.884231 0.182515

The value of $9 is missing in test.pdb. If I put in -10.171, I get 55.1925 and I get 55.1925 and also on my calculator. Maybe you made a typo?
test2.db gives 77.9203 with awk and also on the...

Another awk one:

awk '$1 != X && X = $1 { if(NR>1)print "" } 1' file

Typo.

awk 'BEGIN { MIN=99999999; MAX=-MIN; OFS="\t"; BINSIZE=10; }

{ A=sprintf("%d", $2/BINSIZE);
B=sprintf("%d", $3/BINSIZE);
BIN[A OFS B]++;
}
END { for(X in...

There's a reason I set the MIN and MAX values to what they were. Look at the defaults -- a positive minimum and a negative maximum. The first data item will override them because they're smaller...

Hi.

Are you sure that you have unformatted data? What do you think that means? ... cheers, drl

Looking at the program, it appeared to me that atoms1 is a list. len(atoms1) is the number of items in the list. From skimming the program it appears to me that it is possible under certain...

If you could post a sample of your data, a sample of what output you want, and show your calculations that would be much, much better than trying to explain an algorithm in casual English. It's a...

Given that awk script doesn't even have 7 lines, I'm not sure what to tell you about the syntax error, but if you want a standard deviation for each column, you're going to need to loop over each...