set logscale x
 set nologscale y
set grid 
set key 
 set numberofyaxis 0 
set autoscale
set xlabel " time [s]" 
 set ylabel " Vout [V]" 
 set title " ich weiss auch nicht" 
 set term postscript 16 
 set output "tmp.ps"  
set zero 1.000000e-30
plot "stack 0" using 1:2 with lines