tikz图改变x轴的一个值

Question

我不太熟悉 tikz 图。图看起来确实应该如此，但我想更改最后一个位置值300到n在情节中。这可能吗？

\documentclass[]{article}
\usepackage[utf8]{inputenc}
\usepackage{fullpage}
\usepackage{amsmath}
\usepackage{amssymb}
% for graphs
\usepackage{tikz}
\usetikzlibrary{arrows,automata}
\usetikzlibrary{calc}
\def\layersep{2.5cm}
\usepackage{pgfplots}
\pgfplotsset{compat=1.4}


\begin{document}
    \begin{tikzpicture}
        \begin{axis}[
            xlabel=No. of Neihbours,
            ylabel=MAE
            ]   
        \addplot plot coordinates {
                (1,     0.753804)
                (10,    0.759822)
                (25,    0.745213)
                (50,    0.741495)
                (75,    0.743365)
                (100,   0.746219)
                (175,   0.755337)
                (200,   0.758157)
                (300,   0.825300)
        };  

        \legend{$fullcos$\\$d=3$\\$d=4$\\$d=5$\\$d=6$\\}

        \end{axis}
    \end{tikzpicture}
\end{document}

Answer 1

一种可能性是使用xticklabels={<list of values>}：

\documentclass{article}
\usepackage{pgfplots}

\begin{document}

 \begin{tikzpicture}
    \begin{axis}[
        xlabel=No. of Neighbours,
        ylabel=RSME,
        xticklabels={0,0,50,100,150,200,250,n},
        ]   
    \addplot plot coordinates {
            (1,     1.040923)
            (10,    1.015503)
            (25,    0.947140)
            (50,    0.923818)
            (75,    0.922332)
            (100,   0.925733)
            (175,   0.941590)
            (200,   0.946928)
            (300,   1.064557)
    };  
    \legend{$d=2$\\$d=3$\\$d=4$\\$d=5$\\$d=6$\\}
    \end{axis}
\end{tikzpicture}

\end{document}

如果 x 标签列表太长，上述解决方案可能会很麻烦；这里是另一种方法，只允许更改最后一个标签，而不修改之前的值：

\documentclass{article}
\usepackage{pgfplots}

\begin{document}

 \begin{tikzpicture}

    \begin{axis}[
        xlabel=No. of Neighbours,
        ylabel=RSME,
       every x tick label/.append style={alias=ultick},
       extra description/.append code={
            \fill [white] (ultick.north west) ++(0pt,-2\pgflinewidth) rectangle (ultick.south east);         
            \node [anchor=south] at (ultick.south) {n};}        ]   
    \addplot plot coordinates {
            (1,     1.040923)
            (10,    1.015503)
            (25,    0.947140)
            (50,    0.923818)
            (75,    0.922332)
            (100,   0.925733)
            (175,   0.941590)
            (200,   0.946928)
            (300,   1.064557)
    };  
    \legend{$d=2$\\$d=3$\\$d=4$\\$d=5$\\$d=6$\\}
    \end{axis}
\end{tikzpicture}

\end{document}