[Radiance-general] Bash problems

[Greg Ward]

Hi Dan,

I haven't really been following this thread, but did you try the  
"floor()" function around your rcalc expression to guarantee you get  
an integer result?

-Greg

> From: Dan Fitzpatrick <danf at eb7.co.uk>
> Date: July 22, 2009 10:29:11 AM PDT
>
> Dear Community
>
> I am trying to determine a maximum illum value within a picture  
> file then print the result if it is above a certain value.  Here is  
> where I am at the moment:
>
> maxim=$(pextrem -o 9.pic | rcalc -e '$1=($3*0.265+$4*0.670+$5*0.065) 
> *179' | total -u)
> echo $maxim
> if [ "$maxim" -gt 15000 ] ; then
> pextrem -o 9.pic | rcalc -e '$1=($3*0.265+$4*0.670+$5*0.065)*179'  
> total -u > 9.dat
> fi
> done
>
> The problem:  I keep getting the : integer expression expected  
> warning.  As far as I can see, $maxim is an integer as shown from  
> the echo expression.  Therefore I don't understand what I'm doing  
> wrong here.  Any pointers will be greatly appreciated.
>
> Dan