reset

set title "Hallwiderstand bei konstantem Strom I_s = 101.4 mA"
set xlabel "[B in T]"
set ylabel "[R in {/Symbol W}]"
set yrange [2:2.4]
set grid xtics ytics
set key top left

f(x) = a*x + b
fit f(x) 'DatenHallGoldIconst.txt' us ($2):($4)/($1 / 1000) via a,b

plot \
'DatenHallGoldIconst.txt' us ($2):($4)/($1 / 1000) notitle lt 1, \
f(x) title "Ausgleichsgerade" lt 3

set output "hallwiderstandgoldiconst.eps"
set term postscript enhanced eps color; replot