tikz-ecoc-svm/hard-margin.tex at master · aochoae/tikz-ecoc-svm · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
\RequirePackage{luatex85}
\documentclass{standalone}

\usepackage{xparse}

\usepackage{amsmath}
\newcommand{\vectorunit}[1]{\hat{\mathbf{#1}}}
\NewDocumentCommand\norm{ o m }{\|\mathbf{#2}\|\IfNoValueF{#1}{_{#1}}}

\usepackage{fontspec, unicode-math}
\setsansfont[Scale=MatchLowercase]{TeX Gyre Heros}
\setmathfont{TeX Gyre Termes Math}

\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\usepackage{pgfplots}
\pgfplotsset{compat=1.14}

\tikzset{
  every picture/.style={font={\sffamily\normalsize}, >=stealth},
  every pin edge/.style={black}}

\begin{document}

  \begin{tikzpicture}
    \begin{axis}[%
      axis equal image,
      axis lines=center,
      xmax = 9,
      xmin = -0.5,
      ymax = 7,
      ymin = -0.5,
      xtick = \empty,
      ytick = \empty,
      no markers]

      \addplot[dashed, ->] coordinates {(0, 0) (11/5, 22/5)}
        node[midway, left=5pt]{$b$};

      \addplot[thick, ->] coordinates {(0, 0) (0.4472, 0.8944)}
        node[below right]{$\vectorunit{w}$};

      \addplot[dashed, <->] coordinates {(6.6, 1.2) (7.4, 2.8)}
        node[right=10pt, above]{$\frac{2}{\norm{w}}$};

      \addplot[black, thin, domain=1:7] {(9 - x) / 2}
        node[pos=0.05, sloped, above] {\tiny $D_{-}$};
      \addplot[black, thick, domain=(7/5):(37/5)] {(11 - x) / 2}
        node[pos=0.025, sloped, above] {\tiny $D$};
      \addplot[black, thin, domain=(9/5):(39/5)] {(13 - x) / 2}
        node[pos=0.05, sloped, above] {\tiny $D_{+}$};

      \addplot[
        scatter,
        only marks,
        point meta=explicit symbolic,
        scatter/classes={
          a={mark=*},
          b={mark=*, draw=black, fill=white},
          v={mark=o, draw=darkgray, thick, scale=2.25}
        }]
        table[meta=label] {
          x   y   label
          4   6   a
          5   4   a
          5.5 5   a
          6.5 5   a
          7   3.5 a
          7   5.5 a
          1   3   b
          1.5 0.5 b
          2   2.5 b
          3   3   b
          4   1   b
          5   2   b
          3   3   v
          5   2   v
          5   4   v
      };
    \end{axis}
  \end{tikzpicture}

\end{document}