set terminal epslatex color colortext
set datafile separator ","
set output "fits/logK_vs_x.eps"
set xlabel '$x/\unit{\micro m}$'
set ylabel '$\log(K)$'
#set xtics 500000
set pointsize 2
g(x) = a*x + b
fit g(x) "fits/transmission_vs_x.CSV" using 1:4 via a,b
plot "fits/transmission_vs_x.CSV" using 1:4 title '$\log(K)$', g(x)