我目前正在使用 MATLAB 中带反馈的非线性模型开发一些模拟，其中存在一些不稳定的轨迹。
我想使用 matlab2tikz 导出它，这样我就可以在我的乳胶文档中获得与此完全一样的内容：
我遇到的主要问题是，当尝试将此 .tex 文件添加到我的文档时，它会产生一个错误，其中 pgfplots 不确定如何处理 nan。
\documentclass[tikz]{standalone}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots}
\usepackage{grffile}
\pgfplotsset{compat=newest}
\usetikzlibrary{plotmarks}
\usetikzlibrary{arrows.meta}
\usepgfplotslibrary{patchplots}
\usepackage{amsmath}
\begin{document}
\begin{tikzpicture}
\begin{axis}[%
width=6.028in,
height=4.754in,
at={(1.011in,0.642in)},
scale only axis,
unbounded coords=jump,
xmin=0,
xmax=30,
ymin=-60,
ymax=60,
axis background/.style={fill=white}
]
\addplot [color=red, line width=2.0pt, forget plot]
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nan nan\\
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nan nan\\
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\end{axis}
\end{tikzpicture}%
\end{document}
我事后尝试在 MATLAB 中使用类似
z = find(isnan(x_rec))';
x_rec(z) = 0;
去掉用于图表的向量元素中的所有 nan。但当我运行 matlab2tikz 时，它仍然会生成这些 nan 值。MATLAB/LaTeX 内部是否有任何修复程序可用于解决此问题？任何意见都将不胜感激。
编辑1：已清除
编辑2：根据用户评论添加了请求的更改
编辑3：我完全按照您在回答中提出的建议去做了。
我做了一个稍微复杂一点的例子，但没有所有的轨迹，看看是否可以将它应用于更大的情况。
我收到以下错误输出：
/Users/.../Dropbox/Flight Models/F16 MRAC/Improvments/simulations/export/lqr_case3_test.tex:820：缺少数字，视为零。[\end{axis}] /Users/.../Dropbox/Flight Models/F16 MRAC/Improvments/simulations/export/lqr_case3_test.tex:820：缺少数字，视为零。[\end{axis}] /Users/.../Dropbox/Flight Models/F16 MRAC/Improvments/simulations/export/lqr_case3_test.tex:820：计量单位非法（插入 pt）。[\end{axis}]
代码附后：
\documentclass[tikz]{standalone}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots}
\usepackage{grffile}
\pgfplotsset{compat=newest}
\usetikzlibrary{plotmarks}
\usetikzlibrary{arrows.meta}
\usepgfplotslibrary{patchplots}
\usepackage{amsmath}
\begin{document}
\begin{tikzpicture}
\begin{axis}[%
width=6.028in,
height=1.258in,
at={(1.011in,4.137in)},
scale only axis,
unbounded coords=jump,
xmin=0,
xmax=30,
xlabel style={font=\color{white!15!black}},
xlabel={$t$ [s]},
ymin=-10,
ymax=10,
y filter/.expression={y < -10 ? -10 : y},
ytick = {-60,-40,-20,0,20,40,60},
xtick= {0,5,10,15,20,25,30},
ylabel style={font=\color{white!15!black}},
ylabel={$\mathrm{e}_\mathrm{y}(t)$},
axis background/.style={fill=white}
]
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table[row sep=crcr]{%
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table[row sep=crcr]{%
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table[row sep=crcr]{%
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table[row sep=crcr]{%
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\end{axis}
\end{tikzpicture}
\end{document}
答案1
我无法在我的计算机上重现您的错误，但关于您需要的输出，您可以在环境y filter中添加选项axis。这会将一些代码应用于数据集的任何 y 值。请参阅 pgfplots 手册第 4.22 节 p386。
在您的情况下，表达式y filter/.expression={y < -60 ? -60 : y}检查数据点的 y 值是否低于 -60，如果是，则将值更改为 -60，如果不是，则保留其初始值。
一般来说，在图形渲染软件中，nan用于使东西不可见，同时保持良好的对象尺寸，在您的情况下，是两个列矩阵。
\documentclass[tikz,border=3.14mm]{standalone}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots}
\usepackage{grffile}
\pgfplotsset{compat=newest}
\usetikzlibrary{plotmarks}
\usetikzlibrary{arrows.meta}
\usepgfplotslibrary{patchplots}
\usepackage{amsmath}
\begin{document}
\begin{tikzpicture}
\begin{axis}[%
width=6.028in,
height=4.754in,
at={(1.011in,0.642in)},
scale only axis,
%unbounded coords=jump,
xmin=0,
xmax=30,
ymin=-60,
ymax=60,
y filter/.expression={y < -60 ? -60 : y},
ytick = {-60,-40,-20,0,20,40,60},
xtick= {0,5,10,15,20,25,30},
axis background/.style={fill=white}
]
\addplot [color=red, line width=2.0pt, forget plot]
table[row sep=crcr]{%
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nan nan\\
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nan nan\\
0 -0\\
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0 -5.90295810358706e+20\\
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};
\end{axis}
\end{tikzpicture}%
\end{document}
与 OP EDIT3 相关的更新
我通过删除与您指出的错误无关的所有部分来简化您的 MWE，并修改了过滤标准，以便y filter/.expression={abs(y) > 10 ? sign(y)*10 : y}将任何过大的值（绝对值大于 10）设置为 +-10，从而解决了由于这个 y 值导致的错误562949953421312。
总结一下我的回答，价值没有问题nan，而是数值大，这是完全正常的。
\documentclass[tikz]{standalone}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots}
\usepackage{grffile}
\pgfplotsset{compat=newest}
\usetikzlibrary{plotmarks}
\usetikzlibrary{arrows.meta}
\usepgfplotslibrary{patchplots}
\usepackage{amsmath}
\begin{document}
\begin{tikzpicture}
\begin{axis}[%
width=6.028in,
height=1.258in,
at={(1.011in,4.137in)},
scale only axis,
unbounded coords=jump,
xmin=0,
xmax=30,
xlabel style={font=\color{white!15!black}},
xlabel={$t$ [s]},
ymin=-10,
ymax=10,
y filter/.expression={abs(y) > 10 ? sign(y)*10 : y},
ytick = {-60,-40,-20,0,20,40,60},
xtick= {0,5,10,15,20,25,30},
ylabel style={font=\color{white!15!black}},
ylabel={$\mathrm{e}_\mathrm{y}(t)$},
axis background/.style={fill=white}
]
\addplot [color=red, line width=2.0pt, forget plot]
table[row sep=crcr]{%
0 -0.125\\
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\end{axis}
\end{tikzpicture}
\end{document}