Linux Scritpting: Using a variable

[ankursinha]

Dear friends,

I have a code which needs to be executed 50 times with a different seed (between 0 and 1) every time.

How do I write a shell cript to change the seed value ever time.

This is what I have been able to do. Please take me through.

for (( i = 1 ; i <= 50; i++ ))
do
./my_code .111
done

How do I change the value of 0.111 in every iteration. I am using argc argv to read the seed as input.

Looking for an early reply.

Thanks,
Anks

[ankursinha]

To add to the above post.

It would not be possible for me to use expr`` as I am running the script on a cluster and expr doesnt work on it.

TIA

[vsemaska]

You could use bash's builtin variable RANDOM which generates a number between 0 and 32767. A little math and you can convert that to a number between 0 and 1.

SEED=`echo "$RANDOM / 32767" | bc -l`
./my_code $SEED