bash and real arithmetic

Igor Pechtchanski pechtcha@cs.nyu.edu
Fri Apr 11 18:02:00 GMT 2003


On Sat, 12 Apr 2003, Stepan Yakovenko wrote:

> HI!
>
>   Is it possible to get for loops working
>   in double arithmetic in bash ? I've got to run
>   a program with a real argument many times, changing it
>   every run by some fixed small (<1) number.
>
>   Tanx in advance, sorry for my broken English.

Umm, scale?  For example:

   for (( i=0; i < 10; i++ )); do echo 0.$i; done

You could also try using something like awk for driving the loop:

   awk 'BEGIN {for (i=0; i < 1; i+=0.1) system("echo " i)}' < /dev/null

Hope this helps,
	Igor
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