caption setting, bolded figure and table, and single spacing without caption package

Question

These limitations and difficulties I face because I couldn't use caption package. If I add \usepackage{caption}, I couldn't preview my document.. I'm using BaKoMa TeX. There are a lot of bugs which is beyond repair for this moment. :-(

1. I need to have the word Figure in the figure environment caption to be bold. (same goes for table)

2. If possible I want the caption length is equal to table's width and it is in single spacing. The whole document is in double spacing. For example

Here is the LaTeX code:

\documentclass{report}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{booktabs,xcolor,amssymb} %% also needed
\begin{document}
\begin{table}[H]\label{comparisonfourierandnonfourier1}\caption{Comparison between Fourier and Non-Fourier heat conduction equation (HCE).}\centering
\begin{tabular}{l c c}
\toprule
\textbf{\textcolor{blue}{Item}} & \textbf{\textcolor{blue}{Fourier HCE}} &    
\textbf{\textcolor{blue}{non-Fourier HCE}}\\
\midrule
1) conservation energy & same & same \\ 
2) heat flux equation & $q=-k\triangledown T$ & $\tau\displaystyle\frac{\partial q}   
{\partial t}+q=-k\frac{\partial T}{\partial r}$ \\ 
3) equation form & parabolic  & hyperbolic \\ 
4) heat propagation & infinite  & finite \\ 
5) temperature gradient & moderate  & extreme \\ 
\bottomrule\end{tabular}
\end{table}
\end{document}

Is there any other way to do this given that the limitation I face... by only using the graphicx package? Maybe some \renewcommand perhaps... I do appreciate for your advice.

Answer 1

I've taken your MWE and made the following main changes:

• I inserted the full definition of the internal LaTeX macro \@makecaption (from report.cls) and changed its settings so that the float's name (Figure or Table) and number are set in bold. (Aside: This partial redefinition of the macro \@makecaption could be accomplished more elegantly, in general, by loading the etoolbox package and invoking the \patchcmd macro. However, since your TeX distribution appears to be so old that the caption package won't even work correctly, I have a hunch that the etoolbox package won't be available either...)
• I changed the table environment from tabular to tabular* and provided further code so that the table automatically occupies a width of \textwidth (by adding the unwieldy-looking item @{\extracolsep{\fill}}).
• You mention separately that your document is set double-spaced but that you want the caption's text (if it occupies more than 1 line) to be single-spaced. Your MWE doesn't actually show how you achieve double-spacing, so I've tried to mimic that by loading the setspace package and invoking \doublespacing. This approach has an important advantage: all items such as footnotes and floats will automatically be single-spaced regardless of the spacing in the "main" body of the document.

An additional comment: Always place the \label command after the float's \caption command. Otherwise, your cross-references won't be correct.

\documentclass{report}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{booktabs,xcolor,amssymb} %% also needed
\usepackage{setspace}
\doublespacing
\makeatletter
% need to modify definition of \@makecaption macro
% (found in report.cls)
\long\def\@makecaption#1#2{%
  \vskip\abovecaptionskip
  \sbox\@tempboxa{\textbf{#1}: #2}% % change "#1" to "\textbf{#1}"
  \ifdim \wd\@tempboxa >\hsize
    \textbf{#1}: #2\par             % change "#1" to "\textbf{#1}"
  \else
    \global \@minipagefalse
    \hb@xt@\hsize{\hfil\box\@tempboxa\hfil}%
  \fi
  \vskip\belowcaptionskip}
\makeatother
\begin{document}
\begin{table}
\caption{Comparison between Fourier and Non-Fourier heat conduction equation (HCE).}
\label{comparisonfourierandnonfourier1}
%\centering % no longer needed
\begin{tabular*}{\textwidth}{@{}l@{\extracolsep{\fill}} c c@{}}
\toprule
\textbf{\textcolor{blue}{Item}} & \textbf{\textcolor{blue}{Fourier HCE}} &    
\textbf{\textcolor{blue}{non-Fourier HCE}}\\
\midrule
1) conservation energy & same & same \\ 
2) heat flux equation & $q=-k\triangledown T$ & 
   $\tau\displaystyle\frac{\partial q}   
   {\partial t}+q=-k\frac{\partial T}{\partial r}$ \\[1.5ex]
3) equation form & parabolic  & hyperbolic \\ 
4) heat propagation & infinite  & finite \\ 
5) temperature gradient & moderate  & extreme \\ 
\bottomrule
\end{tabular*}
\end{table}
\end{document}