Function

[Mario Trangoni]

The only one thing about Im not sure.. is to obtain the value of the 
function at one place. Because I dont need the complete charge graphic.

How can I make that?

Thank you

Mario

dastew at sympatico.ca schrieb:
>
>
> ------------------------------------------------------------------------
> Date: Sat, 4 Jul 2009 20:22:09 -0300
> From: mjtrangoni at gmail.com
> To: help-octave at octave.org
> Subject: Function
>
> Hi, Im Mario from Argentina.
>
> I want to make a graphic of a continuous function that change itselft 
> at certain place. Maybe someone know how to manage this case.
>
> It's a current's graphic of a chage/discharge of a 
> resistant-inductance serial circuit.
>
> The script file that I was making is that:
>
>
>     /##Expresion de i_a en el tiempo
>     # Define eje x - de 0 a 5
>     t = linspace(0, 2, 500);
>     tiempo = 2;
>     figure, clf
>
>     #Funcion a graficar
>     #t(1:length(t)/2)
>     x1 = (24.-(24.*(e.^(-1.*(t(1:length(t)./2))))));
>
>     #t(length(t)/2:end)
>     #x2 =
>     (24.-(24.*(e.^(-1.*(t(250)))))).*(e.^(-1.*((t(length(t)./2+1:end)))));
>
>     #x2 = (a.*(e.^(-1.*((t(length(t)/2+1:end).-(t(1:length(t)/2)))))));
>     x2 = ((24.-(24.*(e.^(-1.)))).*(e.^(-1.*((t(length(t)/2+1:end))))));
>
>
>     #x2 =
>     ((24.-(24.*(e.^(-1.)))).*(e.^(-1.*((t(length(t)/2+1:end).-(t(1:length(t)/2)))))));
>     #Ploteo
>
>     plot(t, [x1 x2], "b", "linewidth", 0.5)
>
>     size(t)
>     size(x1)
>     size(x2)
>
>     #plot(t, y(t), "b", "linewidth", 0.5);
>     #plot(t, ((24.-1)./1)*(1.-e.^(-t)), "b", "linewidth", 0.5);
>
>     #Grilla
>     grid on, hold on
>
>     #Titulo
>     title('Corriente de Armadura i_a', 'FontSize',20);
>
>     #Ejes
>     ylabel('i_a (A)','FontSize',16)
>     xlabel('t (seg)','FontSize',16)
>
>     ## Imprime solido en eps
>     print "-S1680,1050" -solid -deps ia.eps;
>
>     /
>
> Looking forward for an answer
>
>
> Mario Trangoni
> UTN FRC
> Argentina
>
>
>
>
> Is this what you were thinking?
>
> t1=0:.2:10;
> t2=0:.2:10;
> t3=0:.2:20.2;
> x1=24*(1-e.^(-t1));
> x2=24*e.^(-t2);
>
> x=[x1 x2];
>
> plot(t3,x)
>
>
>
> Doug
>

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