[Radiance-general] Bash problems

[Dan Fitzpatrick]

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