[GRASSLIST:5866] Re: very short script help

[Daniel Victoria]

Hi,

The problem is probably in the expression. As far as I know, expr
won't work with floaing point so in this case, you'll have to use bc.

On my system, the command would be:

echo "3.3/1" | bc - l

the -l (lowercase L) swith is to use standard math librarie, but it
then uses around 10 decimal places....

In your case, you'd replace 1 with $i

Cheers
Daniel


On Mon, 21 Feb 2005 12:12:00 +0100, javier garcia <rn001 at cebas.csic.es> wrote:
> Please, I don't have any idea of bash and I'm trying to do a very short script
> to alter the region for a set of descending resolutions, but I must be doing
> someting wrong:
> 
> --------------
> #!/bin/sh
> 
> i=33
> while [ $i -ge 1 ]
> do
>  resol= `expr 3.3 / $i`
>  g.region n=9.9 s=0 e=3.3 w=0 res=$resol
>  echo  "resolution is $resol"
>  i=`expr $i - 1`
> done
> --------------
> 
> Please, could you help with this?
> 
> Best regards,
> 
> Javier
> 
>