#
# Display the measured temp and the actuator.
# FileLog definition: 
#   define FileLog fhtlog1 fht1:.*(temp|actuator).* /var/log/fht1-%Y-%U.log 
#
set terminal png size 800,200 crop
set output '<OUT>.png'
set xdata time
set timefmt "%Y-%m-%d_%H:%M:%S"
set xlabel " "
set ytics nomirror
set y2tics
set ytics 1
set title '<TL>'
set grid

set ylabel "Temperature (Celsius)"
set y2label "Actuator (%)"
plot \
  "< awk '/measured/{print $1, $4; s=1}' <IN>"\
     using 1:2 axes x1y1 title 'Measured temperature' with lines,\
  "< awk '/actuator/ {print $1, $4+0; have=1} /measured/ {s=$1} END { if(!have) print (s, 0)}' <IN>"\
     using 1:2 axes x1y2 title 'Actuator (%)' with lines