Ejes apuntando en ambas direcciones y etiquetas de posicionamiento de ejes (Tikz). Diagrama AD-AS

Question

Me gustaría reproducir un gráfico como este pero no sé cómo hacer el eje como en la imagen. ¿Alguien sabe cómo? Un ejemplo similar que no tiene eje apuntando en ambos sentidos es:

% Author: Rasmus Pank Roulund
\documentclass{minimal}
\usepackage{tikz}
\usepackage{verbatim}

\begin{comment}
:Title: Intersection of
:Tags: Coordinate systems


This example shows how the ``intersection of`` mechanism of Tikz work. Notice how a horizontal 
line is made from point B to allow the calculation to be done.

Caption: In a fixed exchange regime it might not be possible to reach internal balance 
(full employment and price stability) and external balance (some given level of net export) 
using only fiscal policy. At point B only point C and D can be reached via fiscal policy. 
Only by devaluing the country is able to reach the optimum level at point A.

:Author: Rasmus Pank Roulund

\end{comment}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[
    scale=5,
    axis/.style={very thick, ->, >=stealth'},
    important line/.style={thick},
    dashed line/.style={dashed, thin},
    pile/.style={thick, ->, >=stealth', shorten <=2pt, shorten
    >=2pt},
    every node/.style={color=black}
    ]
    % axis
    \draw[axis] (-0.1,0)  -- (1.1,0) node(xline)[right]
        {$G\uparrow/T\downarrow$};
    \draw[axis] (0,-0.1) -- (0,1.1) node(yline)[above] {$E$};
    % Lines
    \draw[important line] (.15,.15) coordinate (A) -- (.85,.85)
        coordinate (B) node[right, text width=5em] {$Y^O$};
    \draw[important line] (.15,.85) coordinate (C) -- (.85,.15)
        coordinate (D) node[right, text width=5em] {$\mathit{NX}=x$};
    % Intersection of lines
    \fill[red] (intersection cs:
       first line={(A) -- (B)},
       second line={(C) -- (D)}) coordinate (E) circle (.4pt)
       node[above,] {$A$};
    % The E point is placed more or less randomly
    \fill[red]  (E) +(-.075cm,-.2cm) coordinate (out) circle (.4pt)
        node[below left] {$B$};
    % Line connecting out and ext balances
    \draw [pile] (out) -- (intersection of A--B and out--[shift={(0:1pt)}]out)
        coordinate (extbal);
    \fill[red] (extbal) circle (.4pt) node[above] {$C$};
    % line connecting  out and int balances
    \draw [pile] (out) -- (intersection of C--D and out--[shift={(0:1pt)}]out)
        coordinate (intbal);
    \fill[red] (intbal) circle (.4pt) node[above] {$D$};
    % line between out og all balanced out :)
    \draw[pile] (out) -- (E);
\end{tikzpicture}
\end{document}

Editar: Mi código actual es:

\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[
    scale=5,
    axis/.style={very thick, <->, >=stealth'},
    important line/.style={thick},
    every node/.style={color=black}
    ]
    % axis
    \draw[axis] (0.1,0)  -- (1.1,0) node(xline)[right] {$Y$};
    \draw[axis] (0,0.1) -- (0,1.1) node(yline)[above] {$\pi_s$};
    % Lines
    \draw[important line] (.15,.15) coordinate (A) -- (.85,.85)
        coordinate (B) node[right, text width=5em] {$AS$};
    \draw[important line] (.15,.85) coordinate (C) -- (.85,.15)
        coordinate (D) node[right, text width=5em] {$AD$};
\end{tikzpicture}
\end{document}

Salud,

fabio

Solución: Para aquellos que estén interesados ​​en un diagrama AD-AS, esto es lo que logré hasta ahora. Creo que es bastante decente:

\documentclass{minimal}
\usepackage{tikz}
\usepackage{verbatim}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}[
    scale=5,
    axis/.style={very thick, <->, >=stealth'},
    important line/.style={thick},
    every node/.style={color=black}
    ]
    % axis
    \draw[axis] (0.1,0)  -- (1.1,0) node(xline)[midway,below] {$\hat{Y}$};
    \draw[axis] (0,0.1) -- (0,1.1) node(yline)[midway,left] {$  \hat{\pi}_s$};
    % Lines
    \draw[important line] (.15,.15) coordinate (A) -- (.85,.85)
        coordinate (B) node[right, text width=5em] {$AS$};
    \draw[important line] (.15,.85) coordinate (C) -- (.85,.15)
        coordinate (D) node[right, text width=5em] {$AD$};
    %shifted IS-LM diagram
    \draw[xshift=.2cm, red!52] (.15,.10) coordinate (A) -- (.85,.80)
    coordinate (B) node[right, text width=5em] {$AS'$};

    %arrows between intersections
    \draw[->, thick, black, >=stealth']
    (0.61,.59) -- (.72,.48)
    node[sloped, above, midway] {$\hat{\tau}^w_S$};
\end{tikzpicture}
\end{document}

Answer 1

Para obtener puntas de flecha en ambos extremos, utilice <->en lugar de ->.

Para escribir una etiqueta encima del centro de una flecha, use

\draw (0,0) -- (5,0) node[midway,above]{A};

midwayes un alias para pos=0.5.