# set terminal pngcairo  background "#ffffff" enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'timedat.1.png'
set timefmt z "%d/%m/%y\t%H%M"
set timefmt y "%d/%m/%y\t%H%M"
set timefmt x "%d/%m/%y\t%H%M"
set xdata time
set timefmt cb "%d/%m/%y\t%H%M"
set timefmt y2 "%d/%m/%y\t%H%M"
set timefmt x2 "%d/%m/%y\t%H%M"
set format x "%d/%m\n%H:%M"
set grid nopolar
set grid xtics nomxtics ytics nomytics noztics nomztics \
 nox2tics nomx2tics noy2tics nomy2tics nocbtics nomcbtics
set grid layerdefault   linetype -1 linecolor rgb "gray"  linewidth 0.200,  linetype -1 linecolor rgb "gray"  linewidth 0.200
set key inside left top vertical Right noreverse enhanced autotitles nobox
set style data fsteps
set title "Fsteps plot\nwith date and time as x-values" 
set xlabel "Date\nTime" 
set xrange [ "01/06/93\t0000" : "01/11/93\t0000" ] noreverse nowriteback
set ylabel "Concentration\nmg/l" 
set yrange [ 0.00000 : * ] noreverse nowriteback
plot 'timedat.dat' using 1:3 t '',      'timedat.dat' using 1:3 t 'Total P' with points,      'timedat.dat' using 1:4 t '',      'timedat.dat' using 1:4 t 'PO4' with points