我想在这些位置画箭头，如何改变箭头的位置。
谢谢，
代码：
\usepackage[hmargin=2cm,vmargin=1cm]{geometry}
\renewcommand{\rmdefault}{bch} % change default font
\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{arrows,decorations.pathmorphing,backgrounds,fit,positioning,shapes.symbols,chains}
%%%<
\usepackage{verbatim}
\usepackage[active,tightpage,floats]{preview}
\setlength\PreviewBorder{5pt}%
%%%>
\begin{comment}
:Title: Porter model
A Porter five (or six) forces model.
\end{comment}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% BEGIN DOCUMENT
\begin{document}
\begin{figure}[h]
\centering
\begin{tikzpicture}
[node distance = 1cm, auto,font=\footnotesize,
% STYLES
every node/.style={node distance=3cm},
% The comment style is used to describe the characteristics of each force
comment/.style={rectangle, inner sep= 5pt, text width=4cm, node distance=0.25cm, font=\scriptsize\sffamily},
% The force style is used to draw the forces' name
force/.style={rectangle, draw, fill=black!10, inner sep=5pt, text width=4cm, text badly centered, minimum height=1.2cm, font=\bfseries\footnotesize\sffamily}]
% Draw forces
\node [force] (rivalry) {Rivalry among existing competitors};
\node [force, above of=rivalry] (substitutes) {Threat of substitutes};
\node [force, text width=3cm, dashed, left=1cm of substitutes] (state) {Public policies};
\node [force, left=1cm of rivalry] (suppliers) {Bargaining power of suppliers};
\node [force, right=1cm of rivalry] (users) {Bargaining power of users};
\node [force, below of=rivalry] (entrants) {Threat of new entrants};
%%%%%%%%%%%%%%%
% Change data from here
% RIVALRY
\node [comment, below=0.25 of rivalry] (comment-rivalry) {(+) A war against Microsoft\\
(+) Limiting sunk costs\\
(+) Coopetition};
% SUPPLIERS
\node [comment, below=0.25cm of suppliers] {(+) Efficiency\\
(+) Attracting other developers\\
(+) Creating a Chrome community};
% SUBSTITUTES
\node [comment, right=0.25 of substitutes] {(+) Portability};
% USERS
\node [comment, below=0.25 of users] {(+) Increasing the user information\\
(+) Reducing the switching costs};
% NEW ENTRANTS
\node [comment, right=0.25 of entrants] {(+) EC vs. Microsoft};
% PUBLIC POLICIES
\node [comment, text width=3cm, below=0.25 of state] {(+) Positively framed\\
(+) Transparency\\
(--) A new monopoly?};
%%%%%%%%%%%%%%%%
% Draw the links between forces
\path[->,thick]
(substitutes) edge (rivalry)
(suppliers) edge (rivalry)
(users) edge (rivalry)
(entrants) edge (comment-rivalry);
\end{tikzpicture}
\caption{FOSS in Chrome influences industry structure by increasing competition}
\label{fig:6forces}
\end{figure}
\end{document}
答案1
像这样？
您的 MWE 的相关部分：
% Draw the links between forces
\path[->,thick,red]
([xshift=-3mm] substitutes.south east) edge ([xshift=-3mm] rivalry.north east)
(users) edge (rivalry)
(suppliers) edge (rivalry)
([xshift=-3mm] rivalry.south east) edge ([xshift=-3mm] entrants.north east)
(entrants) edge (comment-rivalry)
;
您可以根据需要更改箭头从右边缘的偏移。
答案2
以下是需要更改的相关行：
%%%%%%%%%%%%%%%%
% Draw the links between forces
\path[->,thick]
([xshift=-2ex]substitutes.south east) edge ([xshift=-2ex]rivalry.north east)
(suppliers) edge (rivalry)
(users) edge (rivalry)
(entrants) edge (comment-rivalry)
([xshift=-2ex]rivalry.south east) edge ([xshift=-2ex]entrants.north east);
