Shell Programming and Scripting

Hi,

I wrote the following script:

Code:

#! /bin/bash

for ((i = 1600; i < 3700; i = i + 100))

do

awk '{if ($16 > "'$i'"-101 && $16 < "'$i'") print $0 }' prova > prova1

done

which is supposed to print, from the original file "prova" in the new file prov1 , only the data that at the 16th column goes from 1500 to 3600. I need a for cilce because I nedd to do some operations separately on block 1500-1600, 1600-1700, and so on...
The script works bad, in the sense that It works until 1900, then from 2000 it got crazy. For example it considers 2800 < 2000.
Where do you think is the problem?

Code:

for ((i = 1600; i < 3700; i = i + 100))
do
let a=$i-101
awk -v X=$i -v Y=$a ' ($1 > Y && $1 < X) ' prova > prova1
done

Thanks for the reply!

I solved in the following way:

Code:

#! /bin/bash

for ((i = 1600; i < 3700; i = i + 100))

do

a=$(($i - 100))

echo $a 

awk "{if (\$16 > $i-101 && \$16 < $i) print \$0 }" prova 

done