并排对齐多个图表

Question

我想将这些图表全部对齐，使它们并排。该怎么做？我也搞不清楚为什么它们会歪斜。

\documentclass{article}
\usepackage{tikz}
\begin{document}
\usetikzlibrary{positioning}
\tikzset{main node/.style={circle,fill=black,draw,minimum size=.1cm,inner sep=0pt},}
    \begin{center}
        \begin{tikzpicture}
            \node[main node] (1) {};
            \node[main node] (2) [below = .5cm of 1] {};
            \node[main node] (3) [below right = .5cm and .5cm of 1] {};
            \node[main node] (4) [right = .5cm of 1] {};
        \end{tikzpicture}
        
        \begin{tikzpicture}
            \node[main node] (1) {};
            \node[main node] (2) [below = .5cm of 1] {};
            \node[main node] (3) [below right = .5cm and .5cm of 1] {};
            \node[main node] (4) [right = .5cm of 1] {};
            
            \path[draw,thick]
            (1) edge node {} (2);
        \end{tikzpicture}
        
        \begin{tikzpicture}
            \node[main node] (1) {};
            \node[main node] (2) [below = .5cm of 1] {};
            \node[main node] (3) [below right = .5cm and .5cm of 1] {};
            \node[main node] (4) [right = .5cm of 1] {};
            
            \path[draw,thick]
            (1) edge node {} (2)
            (1) edge node {} (4)
            (1) edge node {} (3);
        \end{tikzpicture}
        
        \begin{tikzpicture}
            \node[main node] (1) {};
            \node[main node] (2) [below = .5cm of 1] {};
            \node[main node] (3) [below right = .5cm and .5cm of 1] {};
            \node[main node] (4) [right = .5cm of 1] {};
            
            \path[draw,thick]
            (3) edge node {} (4)
            (2) edge node {} (3);
        \end{tikzpicture}
        
        \begin{tikzpicture}
            \node[main node] (1) {};
            \node[main node] (2) [below = .5cm of 1] {};
            \node[main node] (3) [below right = .5cm and .5cm of 1] {};
            \node[main node] (4) [right = .5cm of 1] {};
            
            \path[draw,thick]
            (1) edge node {} (2)
            (2) edge node {} (3)
            (3) edge node {} (4)
            (4) edge node {} (1);
        \end{tikzpicture}
        
        \begin{tikzpicture}
            \node[main node] (1) {};
            \node[main node] (2) [below = .5cm of 1] {};
            \node[main node] (3) [below right = .5cm and .5cm of 1] {};
            \node[main node] (4) [right = .5cm of 1] {};
            
            \path[draw,thick]
            (1) edge node {} (2)
            (2) edge node {} (3)
            (3) edge node {} (4);
        \end{tikzpicture}
    \end{center}
\end{document}

Answer 1

正如@SalimBou 在评论中所说，你应该删除图片之间的空行。空行表示新段落。

关于图片的弯曲或倾斜，这来自于你放置节点的方式。首先有一个节点 1，然后在它下面画第二个 (2)，在右边画第四个 (4)。这意味着节点的边界到边界有 0.5 厘米。第三个 (3) 画的是 (0.5cm,-0.5cm)，也就是0.5*sqrt(2)=0.7071在 -45 度的方向上。因为它是从节点的边界到边界画的，这与以前不一样。参见

\begin{tikzpicture}
  \node[main node] (1) {};
  \node[main node] (2) [below = .5cm of 1] {};
  \node[main node] (3) [below right = .5cm and .5cm of 1] {};
  \node[main node] (4) [right = .5cm of 1] {};
  \draw[|-|,red] (1.0) -- +(0.5cm,0cm);
  \draw[|-|,blue] (1.-45) -- +(0.5cm,-0.5cm);
  \draw[->,green,dashed] (1.-45) -- +(-45:0.7071cm);
\end{tikzpicture}
 

我要做的是画出两个左边的节点，然后画出两个右边的节点，

\begin{tikzpicture}
  \node[main node] (1) {};
  \node[main node] (2) [below = .5cm of 1] {};
  \node[main node] (3) [right =.5cm of 2] {};
  \node[main node] (4) [right = .5cm of 1] {};
\end{tikzpicture}