当我设置为 1 时，当我想编译下面的 LaTeX 代码时会出现错误。\var否则我没有问题。我得到的错误是：Package pgfkeys Error: I do not know the key '/tikz/ '
你能告诉我我做错了什么吗？
非常感谢您的回复。
\documentclass{article}
\usepackage{pgfplots}
\begin{filecontents*}{S1data.dat}
20 1.914 1.443 1.137 2.476 23.555
40 1.734 1.381 1.173 1.805 25.001
60 1.737 1.428 1.176 2.176 25.001
80 1.797 1.813 0.94 2.518 25.001
100 1.681 1.256 1.463 2.107 25
120 1.797 1.508 1.254 1.966 25
140 1.649 1.403 1.177 1.825 25
160 1.534 1.438 1.272 2.156 24.998
180 1.541 1.412 1.283 2.408 24.999
200 1.967 1.4 1.205 2.688 49.805
220 1.584 1.257 1.269 1.872 50
240 1.727 1.361 1.292 2.144 50
260 1.479 1.596 1.207 1.726 50
280 1.426 1.349 1.259 2.08 50
300 1.629 1.456 1.321 1.798 50
320 1.872 1.447 1.31 1.574 50
340 1.682 1.503 1.173 1.687 50
360 1.543 1.242 1.22 1.743 50
380 1.823 1.472 1.307 2.005 74.754
400 1.66 1.308 1.441 1.615 75
420 1.636 1.42 1.239 1.754 75
440 1.572 1.505 1.253 1.556 75
460 1.681 1.27 1.139 1.586 75
480 1.74 1.536 1.185 1.996 75
500 1.772 1.318 1.335 2.126 75
\end{filecontents*}
\def\Colorarray{{1}{blue}{2}{red}{3}{orange}{4}{violet}}
\def\getcolor#1{\expandafter\xgetcolor\Colorarray{#1}{}test{#1}}
\def\xgetcolor#1#2#3test#4{\ifnum#4=#1 #2\else\xgetcolor#3test{#4}\fi}
\begin{document}
\pgfkeys{/pgf/number format/.cd, set decimal separator={,{\!}}, set thousands separator={}}
\def\var{1}
\begin{tikzpicture}
\begin{axis}[title={Title}, grid=major, axis x line=bottom, axis y line=left,
xlabel={Time}, ylabel={Page time(s)},
x tick label style={font=\tiny, rotate=35},
y tick label style={font=\tiny},
x label style={font=\small},
y label style={font=\small},
legend entries={Page1,Page2,Page3,Page4},legend style={font=\tiny, at={(1.5,1)}}]
\ifnum\var=1
\foreach \i in {1,2,...,4} {
\addplot[smooth,\getcolor{\i}] table[x index=0,y index=\i] {S1data.dat};
}
\else
\addplot[smooth,\getcolor{1}] table[x index=0,y index=1] {S1data.dat};
\addplot[smooth,\getcolor{2}] table[x index=0,y index=2] {S1data.dat};
\addplot[smooth,\getcolor{3}] table[x index=0,y index=3] {S1data.dat};
\addplot[smooth,\getcolor{4}] table[x index=0,y index=4] {S1data.dat};
\fi
\end{axis}
\end{tikzpicture}
\end{document}
答案1
我不会使用数组来存储颜色，而是使用 PGFPlotscycle list功能，它更加灵活。对于您的情况，您可以设置
\pgfplotsset{
cycle list={
blue,
red,
orange,
violet
}
}
然后在环境中使用\addplot +而不是。 中定义的样式将按照调用顺序应用于绘图。 此方法还允许您设置除颜色之外的其他属性。 如果您希望第三个绘图为黑色、粗体和虚线，您可以说\addplotaxiscycle list
\pgfplotsset{
cycle list={
blue,
red,
{black, thick, dashed},
violet
}
}
如果您确实想坚持您的方法，您应该使用\pgfplotsinvokeforeach{<list} { <code where the list item is available as #1 > }而不是\foreach，这将解决代码中的扩展问题。
cycle list方法代码
\documentclass{article}
\usepackage{pgfplots}
\usepackage{filecontents}
\begin{filecontents*}{S1data.dat}
20 1.914 1.443 1.137 2.476 23.555
40 1.734 1.381 1.173 1.805 25.001
60 1.737 1.428 1.176 2.176 25.001
80 1.797 1.813 0.94 2.518 25.001
100 1.681 1.256 1.463 2.107 25
120 1.797 1.508 1.254 1.966 25
140 1.649 1.403 1.177 1.825 25
160 1.534 1.438 1.272 2.156 24.998
180 1.541 1.412 1.283 2.408 24.999
200 1.967 1.4 1.205 2.688 49.805
220 1.584 1.257 1.269 1.872 50
240 1.727 1.361 1.292 2.144 50
260 1.479 1.596 1.207 1.726 50
280 1.426 1.349 1.259 2.08 50
300 1.629 1.456 1.321 1.798 50
320 1.872 1.447 1.31 1.574 50
340 1.682 1.503 1.173 1.687 50
360 1.543 1.242 1.22 1.743 50
380 1.823 1.472 1.307 2.005 74.754
400 1.66 1.308 1.441 1.615 75
420 1.636 1.42 1.239 1.754 75
440 1.572 1.505 1.253 1.556 75
460 1.681 1.27 1.139 1.586 75
480 1.74 1.536 1.185 1.996 75
500 1.772 1.318 1.335 2.126 75
\end{filecontents*}
\pgfplotsset{
cycle list={
blue,
red,
orange,
violet
}
}
\begin{document}
\pgfkeys{/pgf/number format/.cd, set decimal separator={,{\!}}, set thousands separator={}}
\begin{tikzpicture}
\begin{axis}[title={Title}, grid=major, axis x line=bottom, axis y line=left,
xlabel={Time}, ylabel={Page time(s)},
x tick label style={font=\tiny, rotate=35},
y tick label style={font=\tiny},
x label style={font=\small},
y label style={font=\small},
legend entries={Page1,Page2,Page3,Page4},legend style={font=\tiny, at={(1.5,1)}}]
\foreach \i in {1,2,...,4} {
\addplot +[smooth] table[x index=0,y index=\i] {S1data.dat};
}
\end{axis}
\end{tikzpicture}
\end{document}
pgfplotsinvokeforeach方法代码
\documentclass{article}
\usepackage{pgfplots}
\begin{filecontents*}{S1data.dat}
20 1.914 1.443 1.137 2.476 23.555
40 1.734 1.381 1.173 1.805 25.001
60 1.737 1.428 1.176 2.176 25.001
80 1.797 1.813 0.94 2.518 25.001
100 1.681 1.256 1.463 2.107 25
120 1.797 1.508 1.254 1.966 25
140 1.649 1.403 1.177 1.825 25
160 1.534 1.438 1.272 2.156 24.998
180 1.541 1.412 1.283 2.408 24.999
200 1.967 1.4 1.205 2.688 49.805
220 1.584 1.257 1.269 1.872 50
240 1.727 1.361 1.292 2.144 50
260 1.479 1.596 1.207 1.726 50
280 1.426 1.349 1.259 2.08 50
300 1.629 1.456 1.321 1.798 50
320 1.872 1.447 1.31 1.574 50
340 1.682 1.503 1.173 1.687 50
360 1.543 1.242 1.22 1.743 50
380 1.823 1.472 1.307 2.005 74.754
400 1.66 1.308 1.441 1.615 75
420 1.636 1.42 1.239 1.754 75
440 1.572 1.505 1.253 1.556 75
460 1.681 1.27 1.139 1.586 75
480 1.74 1.536 1.185 1.996 75
500 1.772 1.318 1.335 2.126 75
\end{filecontents*}
\def\Colorarray{{1}{blue}{2}{red}{3}{orange}{4}{violet}}
\def\getcolor#1{\expandafter\xgetcolor\Colorarray{#1}{}test{#1}}
\def\xgetcolor#1#2#3test#4{\ifnum#4=#1 #2\else\xgetcolor#3test{#4}\fi}
\begin{document}
\pgfkeys{/pgf/number format/.cd, set decimal separator={,{\!}}, set thousands separator={}}
\def\var{1}
\begin{tikzpicture}
\begin{axis}[title={Title}, grid=major, axis x line=bottom, axis y line=left,
xlabel={Time}, ylabel={Page time(s)},
x tick label style={font=\tiny, rotate=35},
y tick label style={font=\tiny},
x label style={font=\small},
y label style={font=\small},
legend entries={Page1,Page2,Page3,Page4},legend style={font=\tiny, at={(1.5,1)}}]
\ifnum\var=1
\pgfplotsinvokeforeach{1,2,...,4} {
\addplot[smooth,\getcolor{#1}] table[x index=0,y index=#1] {S1data.dat};
}
\else
\addplot[smooth,\getcolor{1}] table[x index=0,y index=1] {S1data.dat};
\addplot[smooth,\getcolor{2}] table[x index=0,y index=2] {S1data.dat};
\addplot[smooth,\getcolor{3}] table[x index=0,y index=3] {S1data.dat};
\addplot[smooth,\getcolor{4}] table[x index=0,y index=4] {S1data.dat};
\fi
\end{axis}
\end{tikzpicture}
\end{document}