set terminal epslatex font 8 color dashed
set output './ModeleLaTeX_TP-gnuplottex-fig16.tex'
set format '\num{%g}'
set key top right Left
set key width 1
set key heigh 1
set key spacing 1.5

set xlabel 'Temps t (\si{\second})' # attention il faut parfois utiliser certains guillemets
# notamment quand on utilise la commande \si, il faut impérativement des primes '...'
set ylabel 'Tension U (\si{\volt})'

R = 471e3
# Création du fit des données
# ---
# la fonction de fit
f(x)=(9.4-b)*exp(-(x-4.338)/a)+b
fit f(x) 'condo/data_condo_3_100µF_471kΩ.txt' index 0 u 1:2 via a,b
C=a/R*1000000
e=(100-C)/100*100
title_f(a,b) = sprintf('\(\tau = RC = \SI{%.3f}{\second}\) ; \(C = \SI{%.3f}{\micro\farad}\) ; {%.1f}\%', a, C, e)

# Pour Gnuplot directement en ligne de commande
#plot [0.55:5][0:4] 'data_condo.txt' index 0 u 1:2

set style line 1 lt 0 lw 4

plot [4.33:111.6][0:9.5]\
(9.4-0.69)*exp(-(x-4.338)/(R*100e-6*1.2))+0.69 w filledc y1=0 fc rgb 'grey90' title '',\
(9.4-0.69)*exp(-(x-4.338)/(R*100e-6*0.8))+0.69 w filledc y1=0 fc 'white' title '',\
(9.4-0.69)*exp(-(x-4.338)/(R*100e-6))+0.69 ls 1 title '\(U(t)=9.4\cdot e^{-(t-4.338)/47,1}\) ; i(C)=20\%',\
'condo/data_condo_3_100µF_471kΩ.txt' index 0 u 1:2:5:4 title '\(R=\SI{471}{\kilo\ohm}\) ; \(C=\SI{100}{}\pm\SI{20}{\micro\farad}\)' pt 4 lc rgb 'blue' w xyerrorbars,\
f(x) title title_f(a,b) lc 'green'