34 lines
1.3 KiB
Plaintext
34 lines
1.3 KiB
Plaintext
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set terminal epslatex font 8 color dashed
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set output './ModeleLaTeX_TP-gnuplottex-fig7.tex'
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set format '\num{%g}'
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set key top right Left
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set key width 1
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set key heigh 1
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set key spacing 1.5
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set xlabel 'Temps t (\si{\second})' # attention il faut parfois utiliser certains guillemets
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# notamment quand on utilise la commande \si, il faut impérativement des primes '...'
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set ylabel 'Tension U (\si{\volt})'
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R = 471000
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# Création du fit des données
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# ---
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# la fonction de fit
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f(x)=(7.628-b)*exp(-(x-5.5)/a)+b
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fit f(x) 'condo/data_condo_2200µF_8V_471kΩ_0V.txt' index 0 u 1:2 via a,b
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C=a/R*1000000
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e=(2200-C)/2200*100
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title_f(a,b) = sprintf('\(\tau = RC = \SI{%.3f}{\second}\) ; \(C = \SI{%.3f}{\micro\farad}\) ; {%.1f}\%', a, C, e)
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# Pour Gnuplot directement en ligne de commande
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#plot [0.55:5][0:4] 'data_condo.txt' index 0 u 1:2
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set style line 1 lt 0 lw 4
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plot [0:1000][0:10]\
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7.628*exp(-(x-5.5)/(R*2200e-6*1.2)) w filledc y1=0 fc rgb 'grey90' title '',\
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7.628*exp(-(x-5.5)/(R*2200e-6*0.8)) w filledc y1=0 fc 'white' title '',\
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7.628*exp(-(x-5.5)/(R*2200e-6)) ls 1 title '\(U(t)=9.78\cdot e^{-(t-5.5)/1036,2}\) ; i(C)=20\%',\
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'condo/data_condo_2200µF_8V_471kΩ_0V.txt' index 0 u 1:2:5:4 title '\(R=\SI{471000}{\ohm}\) ; \(C=\SI{2200}{}\pm\SI{440}{\micro\farad}\)' pt 4 lc rgb 'grey60' w xyerrorbars,\
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f(x) title title_f(a,b) lc 'green'
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