图形周围的空间以及如何删除它

Question

我在论文中输入了几幅图，我想知道为什么图的上方和侧面以及标题下方总是有这么多空白。标题下方特别烦人，但“偏移”图看起来也很丑。请参阅图片。我尝试过边界框、浮动尺寸和图形尺寸。除了将其做得非常小以适应之外，我还没有找到好的解决方案（使用 LyX）。有什么建议吗？谢谢 Dominik

编辑：更多信息。由于 setspace 返回错误，表示间距已定义，我将其从自定义 .cls 文件中拉出。任何更改都会得到答案吗？

%%%%%%% DEFINE DOUBLE-SPACING (THE DEFAULT) AND OTHER SPACING:
\def\setspace@size{\ifx\@currsize\normalsize\@normalsize\else\@currsize\fi}
\def\doublespacing{ \ifcase \@ptsize \relax
       \def \baselinestretch {1.703}% 10pt -- EDIT (thesis=2.004; see line 251)
\or \def \baselinestretch {1.505}% 11pt -- EDIT (thesis=1.771; see line 252)
\or \def \baselinestretch {1.441}% 12pt -- EDIT (thesis=1.660; see line 253)
  \fi \setspace@size}
\def\singlespacing{\def \baselinestretch {1} \setspace@size \vskip \baselineskip}
\def\setstretch#1{\renewcommand{\baselinestretch}{#1}}
\def\@setsize#1#2#3#4{\@nomath#1
  \let\@currsize#1 \baselineskip #2
  \baselineskip \baselinestretch\baselineskip
  \parskip \baselinestretch\parskip
  \setbox\strutbox \hbox{ \vrule height.7\baselineskip depth.3\baselineskip
  width\z@} \skip\footins \baselinestretch\skip\footins
  \normalbaselineskip\baselineskip#3#4}
%%%%%%%%% floats & footnotes singlespaced %%%%%%%%%
\let\latexx@xfloat=\@xfloat
\def\@xfloat #1[#2]{\latexx@xfloat #1[#2]
\def\baselinestretch{1}\@normalsize \normalsize}
\long\def\@footnotetext#1{
  \insert\footins{
    \def\baselinestretch {1}
    \reset@font\footnotesize
    \interlinepenalty\interfootnotelinepenalty
    \splittopskip\footnotesep
    \splitmaxdepth \dp\strutbox \floatingpenalty \@MM
    \hsize\columnwidth \@parboxrestore
    \protected@edef\@currentlabel{
      \csname p@footnote\endcsname\@thefnmark}
    \color@begingroup \@makefntext{
        \rule\z@\footnotesep\ignorespaces#1\@finalstrut\strutbox}
    \color@endgroup}}
\long\def\@mpfootnotetext#1{
  \global\setbox\@mpfootins\vbox{
    \unvbox \@mpfootins
    \def\baselinestretch {1}
    \reset@font\footnotesize
    \hsize\columnwidth \@parboxrestore
    \protected@edef\@currentlabel{
      \csname p@mpfootnote\endcsname\@thefnmark}
    \color@begingroup \@makefntext{
       \rule\z@\footnotesep\ignorespaces#1\@finalstrut\strutbox}
   \color@endgroup}}
%%%%%%%% single / double spacing %%%%%%%%%
\def\singlespace{ \vskip \baselineskip \def\baselinestretch {1}
  \setspace@size \vskip -\baselineskip }
\def\endsinglespace{\par}
\def\spacing#1{ \par \begingroup \def\baselinestretch {#1} \setspace@size }
\def\endspacing{ \par \vskip \parskip \vskip \baselineskip
  \endgroup \vskip -\parskip \vskip -\baselineskip }
\def\doublespace{ \ifcase \@ptsize \relax
      \spacing{1.6}%1.703   10pt -- EDIT (thesis=2.004; see line 199)
  \or \spacing{1.4}%1.505   11pt -- EDIT (thesis=1.771; see line 200)
  \or \spacing{1.3  }%1.441 12pt -- EDIT (thesis=1.660; see line 201)
  \fi }
   \let\enddoublespace=\endspacing