# set terminal pngcairo  background "#ffffff" enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'mgr.9.png'
set key inside right top vertical Right noreverse enhanced autotitles box linetype -1 linewidth 1.000
set style data lines
set title "UM1-Cell Power" 
set xlabel "Resistance [Ohm]" 
set ylabel "Power [W]" 
n(x)=1.53**2*x/(5.67+x)**2
S = 1
GPFUN_n = "n(x)=1.53**2*x/(5.67+x)**2"
plot [0:50] "battery.dat" t "Power" with xyerrorbars, n(x) t "Theory" w lines