![小 xtick 标记错误吗?](https://linux22.com/image/361488/%E5%B0%8F%20xtick%20%E6%A0%87%E8%AE%B0%E9%94%99%E8%AF%AF%E5%90%97%EF%BC%9F.png)
我正在使用以下代码绘制相同的实验数据,出于某种原因,小 xtick 似乎与其预期位置错位。随着 x 值的增加,小标记和主标记之间的空间越来越大,尽管每隔一个小标记应该与一个主标记完美对齐。为什么会发生这种情况?这可能与小 xtick 步长(1e-3)的值较小有关吗?
\documentclass{standalone}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\usepackage{tikz}
\begin{document}
\centering
\begin{tikzpicture}
\begin{axis}[
width = 11cm, height = 7cm,
xmin = 0.000, xmax = 0.018, ymin = 2, ymax = 9,
xtick = {0.000,0.002,...,0.016}, minor xtick = {0.000,0.001,...,0.018},
ytick = {2,3,...,8}, minor ytick = {2.0,2.2,...,9},
xlabel = $I\mbox{ }{[A]}$, ylabel = $U\mbox{ }{[V]}$,
axis line style = thick, axis lines = middle,
hide obscured x ticks = false, hide obscured y ticks = false,
x tick label style = {/pgf/number format/.cd, fixed, fixed zerofill, precision = 3, use comma, /tikz/.cd}, scaled x ticks = false,
clip = false, grid = both,
grid style = {line width=.1pt, draw=gray!20},
major grid style = {line width = .2pt, draw = gray!50},
enlargelimits = false,
scale = 1,
]
\addplot[color = black, thick, domain = 0.006:0.016]{-307.11*x+7.9911};
\end{axis}
\end{tikzpicture}
\end{document}
结果如下图所示。仔细观察 x 轴。
答案1
你以不寻常的方式定义次要网格。请参见中的更改(通过<--- added
注释代码行指示)姆韦以下:
\documentclass[margin=3mm]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.15}
%\usepackage{pgfplotstable} % not needed in this example
%\usepackage{tikz} % loaded by pgfplots
\begin{document}
\centering
\begin{tikzpicture}
\begin{axis}[
width = 11cm, height = 7cm,
xmin = 0, xmax = 0.018,
ymin = 2, ymax = 9,
xtick = {0.000,0.002,...,0.016},
% minor xtick, = {0.000,0.001,...,0.018},
% ytick = {2,3,...,8},
extra y ticks = {3,5,7}, % <--- added
% minor ytick, = {2.0,2.2,...,9},
xlabel = $I\mbox{ }{[A]}$, ylabel = $U\mbox{ }{[V]}$,
axis line style = thick, axis lines = middle,
x tick label style = {/pgf/number format/.cd,
fixed, fixed zerofill, precision = 3, use comma,
/tikz/.cd},
% hide obscured x ticks = false,
% hide obscured y ticks = false,
scaled x ticks = false,
minor x tick num=1, % <--- added
minor y tick num=4, % <--- added
grid = both,
minor grid style = {densely dashed,very thin},
% enlargelimits = false,
% scale = 1,
]
\addplot[color = black, thick, domain = 0.006:0.016]{-307.11*x+7.9911};
\end{axis}
\end{tikzpicture}
\end{document}