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#!/usr/bin/env gnuplot
set terminal pdf enhanced font 'Helvetica,14' size 16cm,12cm
f(x) = a*x+b;
fit f(x) "data.dat" using 2:1 via a,b
set grid
set title "Voltage to measured ADC"
set xlabel "ADC value"
set ylabel "Voltage [mV]"
plot "data.dat" using 2:1 with points title "data points", \
f(x) with lines title sprintf('linear fit curve mV(x) = %.5f·x%+.5f', a, b)
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