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set terminal png
set output "hysterezni_smycka.png"
set key off
set grid
set angles degrees
k=1
q=1
f(x)=k*x + q
set xlabel "H [A/m]"
set ylabel "D B [T]"
#fit f(x) "komutace_nahoru.txt" using 2:4 via k,q
plot "komutace_nahoru.txt" using 2:($4) with points pt 3, "komutace_nahoru.txt" using (-$2):($6) with points pt 3, "komutace_dolu.txt" using 2:($4) with points pt 4, "komutace_dolu.txt" using (-$2):($6) with points pt 4