set term png size 800,480 set datafile separator ";" datafile = "logfile.log" set ylabel "Voltage (mV)" set y2label "Current (mA)" set y2tics border plot datafile using 7 axes x1y1, \ datafile using 8 axes x1y1, \ datafile using 9 axes x1y1, \ datafile using 6 axes x1y2, \ datafile using 15 axes x1y2 \