如何使 tikzpicture 中的节点具有特定宽度

Question

我是 LaTex 新手。我尝试制作如下图表：

我的 Latex 代码是

\begin{figure}[H]
\centering

\begin{tikzpicture}[node distance = 4cm, auto]
    % Place nodes
    \node [block] (inst) (imp) {Spark SQL};
    \node [block, right=1cm of imp] (data) {Spark Streaming};
    \node [block, right=1cm of data] (sql) {MLib-Machine Learning};
    \node [block, right=1cm of sql] (runsql) {GraphX};
    \node [block, align=left,  minimum width=10cm, below=1cm of runsql] (visual) {Apache Spark};

\end{tikzpicture}
    \caption{The Spark stack}
    \label{fig:sysblocks}
\end{figure}

通过此代码，我能够获得这样的图像。

任何帮助都非常感谢。提前致谢。

Answer 1

我使用以下代码解决了这个问题：

\begin{tikzpicture}[node distance = .4cm, auto]
    % Place nodes
    \node [block] (inst) (imp) {Spark SQL};
    \node [block, right=0.5cm of imp] (data) {Spark Streaming};
    \node [block, right=0.5cm of data] (sql) {MLib-Machine Learning};
    \node [block, right=0.5cm of sql] (runsql) {GraphX};
     \path let \p1=($(imp.west)-(runsql.east)$),
              \n1 = {veclen(\p1)-0.4pt} 
              in node[block, below=of imp.south west, anchor=north west, minimum width=\n1] {Apache Spark};
\end{tikzpicture}
    \caption{The Spark stack}
    \label{fig:sysblocks}
\end{figure}