set output 'prof_petro_c.ps' 
set term postscript enhanced color 'Helvetica,18'  
set grid 
set nokey 
set xlabel 'Distance from center (pixels) ' 
set ylabel 'Average light intensity within R (counts per pixel) ' 
set title '' 
plot [][] 'concen_index.rminus2.out.2' using ($2*10):($5/(3.14159*($2*$2)))   with lines lt 1  lw 8 lc 3  ,  'concen_index.rminus2.out.2' index 1 using ($2*10):($5/(3.14159*($2*$2)))  with impulse lt 1  lw 8 lc -1  
set output 
quit 
