       RE : Parametric plot

• To: mathgroup at smc.vnet.net
• Subject: [mg49213] RE : [mg49195] Parametric plot
• From: "Florian Jaccard" <florian.jaccard at eiaj.ch>
• Date: Thu, 8 Jul 2004 02:50:46 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

```Hello !

If you meant So/Km and Vmax/Km :

If you want t on the horizontal axe , you can for example proceed like this
(but there are a lot of other ways...) :

equa = (so/km)*x - Log[1 - x] == (vmax/km)*t;

<< "Graphics`Graphics`"

<< "Graphics`ImplicitPlot`"

DisplayTogether[(ImplicitPlot[equa /. {so -> #1, vmax -> 15, km -> 10}, {t,
0, 15}, {x, 0, 1},
PlotStyle -> Hue[#1/200]] & ) /@ {1, 20, 100},
(Graphics[{Hue[#1[]/200], Text["so=", {#1[], 1.5}], Text[#1[],
{#1[] + 0.8, 1.5}]}] & ) /@
{{2, 1}, {6, 20}, {10, 100}}, ImageSize -> 600, AxesLabel -> {"t", "x"},

TextStyle -> {FontSize -> 12}, PlotRange -> {{-0.2, 15}, {-1, 2}}];

If you want x on the horizontal axe :

f[x_] := ((so/km)*x - Log[1 - x])*(km/vmax)

<< "Graphics`Legend`"; << "Graphics`Colors`"

Plot[Evaluate[(f[x] /. {so -> #1, vmax -> 15, km -> 10} & ) /@ {1, 20,
100}], {x, 0, 1},
PlotStyle -> {Red, Blue, Green}, PlotLegend -> {"so=1", "so=20",
"so=100"}, LegendPosition -> {1.1, 0},
ImageSize -> 500, AxesLabel -> {"x", "t"}];

N.B. Avoid using capital letters as first letter of variables!

F.Jaccard

-----Message d'origine-----
De : Danilo Bianchi [mailto:kaiowaa at bol.com.br]
Envoyé : mercredi, 7. juillet 2004 07:42
À : mathgroup at smc.vnet.net
Objet : [mg49195] Parametric plot

A str batch reactor model following Michaelis-Menten kinetics gives
the function:
(S0\Km)x - Log[1 - x] = (Vmax\Km) t
where x is the proportion of substrate converted, S0 is, say, 1, 20
and 100 g/L, Km is 10 and Vmax is 15.
How to plot the curves (in the same graphic) for x varying from zero
to 1 against t (from zero to 15, with the given values?

```

• Prev by Date: RE: ploting in high dimensions
• Next by Date: Re: ploting in high dimensions
• Previous by thread: Re: Getting rid of ProductLog
• Next by thread: monte carlo simulations