仅对特定关键字启用 `algpseudocode` 中的粗体

Question

我是 Latex 新手。我想保留算法块中的字体类型，但只将诸如for和之类的关键字设置if为粗体。我不确定ttdefault在算法块内设置是否是最佳方法。任何帮助都将不胜感激。

\documentclass{article}

\usepackage[ruled]{algorithm}
\usepackage[]{algorithmicx}
\usepackage[noend]{algpseudocode}

% make keywords below bold instead
\newcommand\keywordfont{\ttfamily\bfseries}
\algrenewcommand\algorithmicend{{\keywordfont end}}
\algrenewcommand\algorithmicdo{{\keywordfont do}}
\algrenewcommand\algorithmicwhile{{\keywordfont while}}
\algrenewcommand\algorithmicfor{{\keywordfont for}}
\algrenewcommand\algorithmicforall{{\keywordfont for all}}
\algrenewcommand\algorithmicloop{{\keywordfont loop}}
\algrenewcommand\algorithmicrepeat{{\keywordfont repeat}}
\algrenewcommand\algorithmicuntil{{\keywordfont until}}
\algrenewcommand\algorithmicprocedure{{\keywordfont procedure}}
\algrenewcommand\algorithmicfunction{{\keywordfont function}}
\algrenewcommand\algorithmicif{{\keywordfont if}}
\algrenewcommand\algorithmicthen{{\keywordfont then}}
\algrenewcommand\algorithmicelse{{\keywordfont else}}
\algrenewcommand\algorithmicrequire{{\keywordfont Require:}}
\algrenewcommand\algorithmicensure{{\keywordfont Ensure:}}
\algrenewcommand\algorithmicreturn{{\keywordfont return}}

\begin{document}

\begin{algorithm}[H]

% this may not be the best approach
\renewcommand{\ttdefault}{cmtt}
\keywordfont{\ttfamily}

    \begin{algorithmic}
        \caption{Gaussian sampler using Taylor series}
        \State sigma $\gets 8 / \sqrt{2  \pi}$ 
        \State variance $\gets$ sigma$^2$
        \State \Comment{returns pdf(x) = standard Gaussian pdf}
        \Function{pdf}{x}
            \Return $e^{(-x^2 / 2)} / \sqrt{2  \pi}$
        \EndFunction
        \State \Comment{returns CDF(z) = standard Gaussian CDF using Taylor approximation}
        \Function{cdf}{x}
            \If{x $<$ -variance}
                \Return 0.0
            \ElsIf{x $>$ variance}
                \Return 1.0
            \EndIf
        \EndFunction
    \end{algorithmic}
\end{algorithm}

\end{document}

Answer 1

问题是现代计算机没有粗体打字机字体。所以你必须选择一个字体系列，比如lmodern。

\usepackage{lmodern}

为了增加粗体和普通字体之间的对比度，您可以选择轻量级系列。

 \ttfamily\fontseries{l}\selectfont

正如 Werner 在评论中指出的那样，切换字体后，无需修改关键字，因为它们无论如何都是以粗体排版的（参见下面的代码）。

\documentclass{article}

\usepackage[ruled]{algorithm}
\usepackage[]{algorithmicx}
\usepackage[noend]{algpseudocode}
\let\oldalgorithmic\algorithmic 
\renewcommand\algorithmic{\ttfamily\fontseries{l}\selectfont\oldalgorithmic}
\usepackage{lmodern}
\begin{document}

\begin{algorithm}[H]
    \caption{Gaussian sampler using Taylor series}
    \begin{algorithmic}
        \State sigma $\gets 8 / \sqrt{2  \pi}$ 
        \State variance $\gets$ sigma$^2$
        \State \Comment{returns pdf(x) = standard Gaussian pdf}
        \Function{pdf}{x}
            \Return $e^{(-x^2 / 2)} / \sqrt{2  \pi}$
        \EndFunction
        \State \Comment{returns CDF(z) = standard Gaussian CDF using Taylor approximation}
        \Function{cdf}{x}
            \If{x $<$ -variance}
                \Return 0.0
            \ElsIf{x $>$ variance}
                \Return 1.0
            \EndIf
        \EndFunction
    \end{algorithmic}
\end{algorithm}

\end{document}