[Radiance-general] Bash problems

[Lars O. Grobe]

Hi Dan,

it is easier then that. You can use the special variable cond in rcalc
to decide whether any output is to be generated or not.

pextrem -o 9.pic | rcalc -e 'illummax=($3*0.265+$4*0.670+$5*0.065)*179'
-e 'cond=if(illummax-15000,1,-1)' -e '$1=illummax' | total -u > 9.dat

does the job (ok, you will get an empty file 9.dat if the illuminance
value is below 15000).

Cheers, Lars.
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