# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'electron.1.png'
set dummy Vbe, y
set format x "%g" 
set format y "%g" 
set format x2 "%g" 
set format y2 "%g" 
set format z "%g" 
set format cb "%g" 
set format r "%g" 
set grid nopolar
set grid xtics nomxtics ytics nomytics noztics nomztics nortics nomrtics \
 nox2tics nomx2tics noy2tics nomy2tics nocbtics nomcbtics
set grid layerdefault   lt 0 linecolor 0 linewidth 0.500,  lt 0 linecolor 0 linewidth 0.500
set key at 0.200000, 0.00450000 right top vertical Right noreverse enhanced autotitle box lt black linewidth 1.000 dashtype solid
set samples 160, 160
set style data lines
set title "Mutual Characteristic of a Transistor" 
set xlabel "Vbe (base emmitter voltage)" 
set xrange [ 0.00000 : 0.750000 ] noreverse nowriteback
set x2range [ * : * ] noreverse writeback
set ylabel "Ic (collector current)" 
set yrange [ 0.00000 : 0.00500000 ] noreverse nowriteback
set y2range [ * : * ] noreverse writeback
set zrange [ * : * ] noreverse writeback
set cbrange [ * : * ] noreverse writeback
set rrange [ * : * ] noreverse writeback
set colorbox vertical origin screen 0.9, 0.2 size screen 0.05, 0.6 front  noinvert bdefault
Ie(Vbe)=Ies*exp(Vbe/kT_q)
Ic(Vbe)=alpha*Ie(Vbe)+Ico
NO_ANIMATION = 1
Ies = 4e-14
kT_q = 0.025
alpha = 0.99
Ico = 1e-09
plot Ic(Vbe)