Оси, указывающие в обоих направлениях, и метки осей позиционирования (Tikz). Диаграмма AD-AS

Question

Я хотел бы воспроизвести график, подобный этому, но я не знаю, как сделать оси такими, как на картинке. Кто-нибудь знает, как это сделать? Похожий пример, в котором ось не указывает в обе стороны:

% 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}

Редактировать: Мой текущий код:

\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}

Ваше здоровье,

Фабио

Решение: Для тех, кому интересна диаграмма AD-AS, вот чего мне удалось добиться на данный момент. Я думаю, что это довольно прилично:

\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

Чтобы получить наконечники стрел на обоих концах, используйте <->вместо ->.

Чтобы написать метку над серединой стрелки, используйте

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

midwayявляется псевдонимом для pos=0.5.