set key outside bottom
set key box

set terminal png
set output 'mbrtemps.png'
set xdata time
set timefmt "%b %d %H:%M:%S %Y"
set title "Master Bedroom Temperatures" 
set ylabel "Fahrenheit" 
set yrange [30:90]
set xrange [*:*]
set xlabel " "
set grid
set size 1.2 ,0.5
set key top left

heat_on(a, b, c, d) = int(a) | int(b) | int(c) | int(d)

plot 'housetemps.input' using 1:5 t "Outside" w l lc rgb "black", \
     'housetemps.input' using 1:7 t "Subfloor" with lines,  \
     'housetemps.input' using 1:12 title "Earth under MBR" w l, \
     'housetemps.input' using 1:16 title "Mid-insulation" w l, \
     'housetemps.input' using 1:10 title "Wall" w l, \
     'housetemps.input' using 1:6 title "Floor" w l, \
     'zone.data' using 1:(heat_on($5,$7,$8,$9) * (1 - $6) * 35) t "Gas Heat" with points lc rgb "blue", \
     'zone.data' using 1:(heat_on($5,$7,$8,$9) * $6 * 35) t "Solar Heat" with points lc rgb "brown"