对数轴上的额外刻度标签

Question

有人能解释一下如何以十进制而不是指数形式获取额外的 x 刻度标签吗？

我的代码如下：

\documentclass{beamer}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{pgfpages}
%\pgfpagesuselayout{4 on 1}[a4paper, border shrink=3mm, landscape]
\usepackage{siunitx}
\usepackage{tikz}
\usepackage{pgfplots}
\usepackage{amssymb,amsmath}
\sisetup{detect-all}
\pgfplotsset{compat=1.18}

%\usetheme{CambridgeUS}
%\usecolortheme{Spruce}

\title{Sieve Analysis Results}
\date{\today}
\institute{ABC}

\begin{document}
\begin{frame}
    \titlepage
\end{frame}

\begin{frame}{Particle Size Distribution}
    \begin{figure}
    \fontsize{7}{8}\selectfont
        \begin{tikzpicture}
            %\draw [step=0.5, color=black!50!white, very thin] (0,0) grid (10.5,7.5);
            \begin{semilogxaxis}
            [   xmin=0.001,
                width=0.9\textwidth,
                height=0.7\textheight,
                xmax=200,
                ymin=0,
                ymax=100,
                grid=both,
                extra x tick style={font=\fontsize{5}{5}\selectfont},
                extra x ticks={2},
                extra y ticks={10,30,50,70,90},
                %,$0.2$,$0.6$,$2.36$,$6$,$60$,$200$},
                xlabel={Sieve Size (mm)},
                ylabel={Percent Passing},
                log ticks with fixed point,
            ]\addplot[line width=0.75pt, color=red!90!black, mark=*, mark size=1.25pt, smooth] table {sieve.dat};           
            \end{semilogxaxis}      
        \end{tikzpicture}
    \end{figure}
\end{frame}
\end{document}

图表数据如下：

筛孔尺寸（mm）	通过率
13.2	100
9.50	99
6.7	97
4.75	96
2.36	93
1.18	90
0.60	88
0.425	87
0.30	86
0.15	84
0.075	80

谢谢

Answer 1

看来，添加就log identify minor tick positions=false可以extra tick style解决问题。

% used PGFPlots v1.18.1
\documentclass[border=5pt]{standalone}
\usepackage{pgfplots}
    \pgfplotsset{compat=1.18}
\begin{document}
\begin{tikzpicture}
    \begin{semilogxaxis}[
        xmin=0.001,
        xmax=200,
        ymin=0,
        ymax=100,
        log ticks with fixed point,
        extra x ticks={2},
        extra tick style={
            log identify minor tick positions=false,
        },
    ]
    \end{semilogxaxis}
\end{tikzpicture}
\end{document}