reset

set title "Hallspannung bei konstantem Strom I_s = 101.4 mA"
set xlabel "[B in T]"
set ylabel "[U_{H} in mV]"
set grid xtics ytics
set key top left

R_v = 25e3
U_0 = 6.35
U_f_0 = 26e-3
R_f_0 = R_v * U_f_0/(U_0 - U_f_0)

f(x) = a*x + b
fit f(x) 'DatenHallGoldIconst.txt' us ($2):($3) via a,b

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

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