[Tex/LaTex] Combining two files – document class error

combinedocument-classeserrors

I want to combine several latex files. I started with 'combine' package. I encounter a error of \newcounter{par}. Then I moved to using input or include, but then I faced unrecognized document class. Here is my example.
This is my main(mother) file

\documentclass[12pt]{article}
\usepackage{lipsum}
\title{dsjgk}%
\author{gfdl}%
 \date{today}%
\begin{document}
 \section{first file}
\input{1}
 \end{document}

And then here is the other file(child, or subfile)

\documentclass[12pt]{article}
\usepackage{lipsum}
\begin{document}
\section{Something 1}
HERErfhwejlkfhsfhkjsdhjklfdshjk fd
jfhgkldf
kjfshjlksfdh\\\
fhkjsdhgld
jkdskjd
\\
jfkkgjdhf
\lipsum
\end{document}

And here is the error:

 `C:\Users\Yashar\Desktop\test\1.tex

! LaTeX Error: Can be used only in preamble.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.1 \documentclass
                  [12pt]{article}
? 
! Emergency stop.`

I will appreciate if you can help me on this.

Best Answer

use a main file of the form

\documentclass[12pt]{article}
\usepackage{lipsum}
\title{dsjgk}%
\author{gfdl}%
 \date{today}%
\begin{document}
 \maketitle
 \section{first file}
\input{body1}
 \section{second file}
\input{body2}
 \end{document}

then to have a document for just section 1 have

\documentclass[12pt]{article}
\usepackage{lipsum}
\title{first section as a document}%
\author{gfdl}%
 \date{today}%
\begin{document}
 \maketitle
\input{body1}

\end{document}

and the shared body of the section is in body1.tex

   \subsection{zzz}
   hello.....

   \subsection{zzzz}
   hello again.....

and of course for section2 and any other sections have a body2.tex with the shared content and a wrapper document that includes it. Note that the wrapper document including the individual sections might use a different class or options to the main document, depending on requirements.

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[Tex/LaTex] LaTeX Error: File subfigure.sty not found

In case you installed TeX Live from the packages of a Linux distro: Most distros split less-used LaTeX-packages into separate (Linux-distro)-packages. From the link in your question I assume that you are running Arch Linux. In this case you need to install the texlive-latexextra package which contains subfigure.sty. If you are using a different distro, the necessary package might be named differently (e.g. texlive-latex-extra in Debian/Ubuntu).

Also, as Peter notes, the subfigure package is depreciated.

[Tex/LaTex] Book option of the combine document class

Since you only import articles, and the article document class doesn't define the \chapter the result is that you will have a value of 0 for the chapters of each imported article. As @Papiro pointed, you can avoid the display of chapter counter with \renewcommand*\thesection{\arabic{section}}. However, with that, you lose the format \thechapter.\thesection for the sections in the main document, which in my case would be fine.

Below I present other solution that keeps the format \thechapter.\thesection (without the need to add to add \makeatletter \@ifclassloaded{combine}{\renewcommand*\thesection{\arabic{savechapter}.\arabic{section}}}{}\makeatother at each input articles).

\documentclass[book]{combine}
\usepackage[english]{babel}
\usepackage{blindtext}
\usepackage{filecontents}
\usepackage{etoolbox}
\newcounter{savechapter}
\AtBeginEnvironment{papers}{\setcounter{savechapter}{\value{chapter}}}
\makeatletter
\let\oldimport\import
\renewcommand*{\import}{\renewcommand*\thesection{\arabic{savechapter}.\arabic{section}}\oldimport}
\makeatother

% The input articles
\begin{filecontents*}{inputDoc1.tex}
\documentclass{article}
\usepackage[english]{babel}
\usepackage{blindtext}
\begin{document}
\title{First article}
\author{Author of first article}
\maketitle
\begin{abstract}
\blindtext[2]
\end{abstract}
\section{first section}
\blindtext[3]
\section{Second section}
\end{document}
\end{filecontents*}

\begin{filecontents*}{inputDoc2.tex}
\documentclass{article}
\usepackage[english]{babel}
\usepackage{blindtext}
\begin{document}
\title{Second article}
\author{Author of second article}
\maketitle
\begin{abstract}
\blindtext[1]
\end{abstract}
\section{first section}
\blindtext[1]
\end{document}
\end{filecontents*}

\begin{filecontents*}{inputDoc3.tex}
\makeatother
\documentclass{article}
\usepackage[english]{babel}
\usepackage{blindtext}
\setcounter{section}{1}
\begin{document}
\title{Document 1a}
\author{Author of document 1a}
\maketitle
\begin{abstract}
\blindtext[3]
\end{abstract}
\section{first section}
\blindtext[1]
\section{second section}
\blindtext[1]
\end{document}
\end{filecontents*}

% Define abstract to be used in book class (or use report)
% http://tex.stackexchange.com/questions/51483/how-to-write-abstract-and-acknowledgement-in-book-format
\makeatletter
\if@titlepage
  \newenvironment{abstract}{%
      \titlepage
      \null\vfil
      \@beginparpenalty\@lowpenalty
      \begin{center}%
        \bfseries \abstractname
        \@endparpenalty\@M
      \end{center}}%
     {\par\vfil\null\endtitlepage}
\else
  \newenvironment{abstract}{%
      \if@twocolumn
        \section*{\abstractname}%
      \else
        \small
        \begin{center}%
          {\bfseries \abstractname\vspace{-.5em}\vspace{\z@}}%
        \end{center}%
        \quotation
      \fi}
      {\if@twocolumn\else\endquotation\fi}
\fi
\makeatother


% The main document
\begin{document}
\title{The collection}
\author{A. N. Editor}
\date{\today}
\maketitle

\begin{abstract}
\blindtext[1]
\end{abstract}

\tableofcontents

\part{First part}
\blindtext[1]

\chapter{First chapter}
\section{Introduction}
\blindtext[1]

\chapter{Second chapter}
\section{Introduction}
\ldots
\begin{papers}
    \coltoctitle{First article}
    \coltocauthor{Author of first article}
    \import{inputDoc1}
    \coltoctitle{Second article}
    \coltocauthor{Author of second article}
    \import{inputDoc2}
\end{papers}

\chapter{Third chapter}
\section{Introduction}
\ldots
\begin{papers}
    \coltoctitle{Third article}
    \coltocauthor{Author of third article}
    \import{inputDoc3}    
\end{papers}

\chapter{Chapter 4}
\section{Final introduction}

\end{document}

Best Answer

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[Tex/LaTex] LaTeX Error: File subfigure.sty not found

[Tex/LaTex] Book option of the combine document class

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