如何排版这四个选项，使之与图片对齐？

青青子衿

1. \documentclass{article}
2. \usepackage{tikz}
3. \usetikzlibrary{datavisualization} %for graphs and pictures
4. \usetikzlibrary{datavisualization.formats.functions} %for graphs and pictures
5. \usepackage{subcaption}
7. \begin{document}
9. \begin{figure}
10. \begin{subfigure}[t]{0.23\linewidth}
11. \centering
12. \begin{tikzpicture}[baseline,remember picture]
13.     \datavisualization [
14.         scientific axes,
15.         x axis = {label={},length=2.0cm,include value={-0.5,1.5}},
16.         y axis = {label={},length=2.0cm,include value={0.5,-1.5}},
17.         visualize as smooth line=one,
18.         one={style={red}}
19.         ]
20.     data [set=one, format=function] {
21.     var x : interval [0:1];
22.     func y = -\value x ;
23.     };
24. \end{tikzpicture}
25. \end{subfigure}
26. %
27. \begin{subfigure}[t]{0.23\linewidth}
28. \centering
29. \begin{tikzpicture}[baseline,remember picture]
30.     \datavisualization [
31.         scientific axes,
32.         x axis = {label={},length=2.0cm,include value={-0.5,1.5}},
33.         y axis = {label={},length=2.0cm,include value={0.5,-1.5}},
34.         visualize as smooth line=two,
35.         two={style={orange}}
36.         ]
37.     data [set=two, format=function] {
38.     var x : interval [0:1];
39.     func y = -sqrt(\value x) ;
40.     };
41. \end{tikzpicture}
42. \end{subfigure}
43. %
44. \begin{subfigure}[t]{0.23\linewidth}
45. \centering
46. \begin{tikzpicture}[baseline,remember picture]
47.     \datavisualization [
48.         scientific axes,
49.         x axis = {label={},length=2.0cm,include value={-0.5,1.5}},
50.         y axis = {label={},length=2.0cm,include value={0.5,-1.5}},
51.         visualize as smooth line=three,
52.         three={style={blue}}
53.         ]
54.     data [set=three, format=function] {
55.     var x : interval [0:1];
56.     func y = \value x * \value x -2*\value x;
57.     };  
58. \end{tikzpicture}
59. \end{subfigure}
60. %
61. \begin{subfigure}[t]{0.23\linewidth}
62. \centering
63. \begin{tikzpicture}[baseline,remember picture]
64.     \datavisualization [
65.         scientific axes,
66.         x axis = {label={},length=2.0cm,include value={-0.5,1.5}},
67.         y axis = {label={},length=2.0cm,include value={0.5,-1.5}},
68.         visualize as smooth line=three,
69.         three={style={green}}
70.         ]
71.     data [set=three, format=function] {
72.     var x : interval [0:1];
73.     func y = -sqrt(2*\value x-\value x * \value x );
74.     };  
75. \end{tikzpicture}
76. \end{subfigure}
77. %
78. \subcaptionbox{\(y=-x\) \label{fig:z}}[0.230\linewidth]{}%
79. \subcaptionbox{\(y=-\sqrt{x}\) \label{fig:g}}[0.23\linewidth]{}%
80. \subcaptionbox{\(y=x^2-2x\) \label{fig:p}}[0.23\linewidth]{}%
81. \subcaptionbox{\(y=-\sqrt{2x-x^2}\) \label{fig:y}}[0.23\linewidth]{}%
82. \caption{Caption for figure \label{fig:whole}}
83. \end{figure}
85. References to subfigures \subref{fig:z}, \subref{fig:g}, \subref{fig:p}, and \subref{fig:y} in Fig.~\ref{fig:whole}.
86. \end{document}

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kuing

以下写法照搬自 subcaption 宏包手册第 4 页。

另外，[baseline,remember picture] 是多余的，我去掉了，而四个图放一起略显挤，所以我加了 [scale=0.9] 缩小一点点。

1. \documentclass{article}
2. \usepackage{tikz}
3. \usetikzlibrary{datavisualization} %for graphs and pictures
4. \usetikzlibrary{datavisualization.formats.functions} %for graphs and pictures
5. \usepackage{subcaption}
7. \begin{document}
9. \begin{figure}
10. \begin{minipage}[b]{0.25\linewidth}
11. \centering
12. \begin{tikzpicture}[scale=0.9]
13.     \datavisualization [
14.         scientific axes,
15.         x axis = {label={},length=2.0cm,include value={-0.5,1.5}},
16.         y axis = {label={},length=2.0cm,include value={0.5,-1.5}},
17.         visualize as smooth line=one,
18.         one={style={red}}
19.         ]
20.     data [set=one, format=function] {
21.     var x : interval [0:1];
22.     func y = -\value x ;
23.     };
24. \end{tikzpicture}
25. \subcaption{\(y=-x\)}\label{fig:z}
26. \end{minipage}%←这个百分号请勿删除,下同
27. %
28. \begin{minipage}[b]{0.25\linewidth}
29. \centering
30. \begin{tikzpicture}[scale=0.9]
31.     \datavisualization [
32.         scientific axes,
33.         x axis = {label={},length=2.0cm,include value={-0.5,1.5}},
34.         y axis = {label={},length=2.0cm,include value={0.5,-1.5}},
35.         visualize as smooth line=two,
36.         two={style={orange}}
37.         ]
38.     data [set=two, format=function] {
39.     var x : interval [0:1];
40.     func y = -sqrt(\value x) ;
41.     };
42. \end{tikzpicture}
43. \subcaption{\(y=-\sqrt{x}\)}\label{fig:g}
44. \end{minipage}%
45. %
46. \begin{minipage}[b]{0.25\linewidth}
47. \centering
48. \begin{tikzpicture}[scale=0.9]
49.     \datavisualization [
50.         scientific axes,
51.         x axis = {label={},length=2.0cm,include value={-0.5,1.5}},
52.         y axis = {label={},length=2.0cm,include value={0.5,-1.5}},
53.         visualize as smooth line=three,
54.         three={style={blue}}
55.         ]
56.     data [set=three, format=function] {
57.     var x : interval [0:1];
58.     func y = \value x * \value x -2*\value x;
59.     };
60. \end{tikzpicture}
61. \subcaption{\(y=x^2-2x\)}\label{fig:p}
62. \end{minipage}%
63. %
64. \begin{minipage}[b]{0.25\linewidth}
65. \centering
66. \begin{tikzpicture}[scale=0.9]
67.     \datavisualization [
68.         scientific axes,
69.         x axis = {label={},length=2.0cm,include value={-0.5,1.5}},
70.         y axis = {label={},length=2.0cm,include value={0.5,-1.5}},
71.         visualize as smooth line=three,
72.         three={style={green}}
73.         ]
74.     data [set=three, format=function] {
75.     var x : interval [0:1];
76.     func y = -sqrt(2*\value x-\value x * \value x );
77.     };
78. \end{tikzpicture}
79. \subcaption{\(y=-\sqrt{2x-x^2}\)}\label{fig:y}
80. \end{minipage}
81. \caption{Caption for figure}\label{fig:whole}
82. \end{figure}
84. References to subfigures \subref{fig:z}, \subref{fig:g}, \subref{fig:p}, and \subref{fig:y} in Fig.~\ref{fig:whole}.
85. \end{document}

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isee

这处理这种图，都是直接把选项 弄成 node