#------ take means for each time slot and plot --------
day=(12-03-2018  12-03-2018  12-03-2018  12-03-2018)
time1=(12:20    14:10      15:30      16:20)
time2=(12:50    14:40      16:00      16:50)
Tmax=( 20.      0.         0.         0.)
scan=(   1      2          3          4)

for (( i = 1; i <= ${#day[@]}; ++i )) do  #<= for the case of zsh
  echo $i ${day[$i]} ${time1[$i]} ${time2[$i]}  ${Tmax[$i]}
  rm -f  dcsDB_mean_dummy.txt
  rm -f  Tscan_2018A_${scan[$i]}.txt
  root -l -q -b 'dcsDB_mean.C(
     "'${day[$i]}'","'${time1[$i]}'", "'${day[$i]}'", "'${time2[$i]}'") '
  cp dcsDB_mean_dummy.txt Tscan_2018A_${scan[$i]}.txt
  root -l -q -b 'plot_dcsDB_mean.C('"${Tmax[$i]}"')'
done