[Tex/LaTex] Cross-referencing between chapters

cross-referencing

I am writing a thesis. In the main file of the thesis, I have included \usepackage{xr}. Then in Chapter2, I have included \externaldocument{./Chapters/Chapter1} to get access of equations of Chapter1. But I cant. Can anyone help me in this regard?

Best Answer

The xr package is not meant to get references from external files that are included anyway -- it works, but it will complain about the multiply defined labels (unless the optional argument of \externaldocument is used.

Rather use \include or \input. This way the content of files are included and the references are correct anyway!

\documentclass{book}


\begin{document}

In \ref{eq:first} and \ref{eq:second} we will see that

\include{chapterone}


\include{chaptertwo}
\end{document}

chapterone.tex:

\chapter{First chapter}

\begin{equation}
  E=mc^2 \label{eq:first}
\end{equation}

chaptertwo.tex

\chapter{Second chapter}

\begin{equation}
  c^2 = a^2 + b^2 \label{eq:second}
\end{equation}

Other way (but not really useful!):

\documentclass{book}

\usepackage{xr}

\externaldocument[Aext]{chapterone}

\externaldocument[Bext]{chaptertwo}

\begin{document}

In \ref{eq:first} and \ref{eq:second} we will see that

\include{chapterone}


\include{chaptertwo}
\end{document}

Related Solutions

[Tex/LaTex] Cross-referencing between different files

You can use the xr package to reference to other LaTeX document.

So in chapterII.tex you say:

\usepackage{xr}
\externaldocument{chapterI}

And then can use \ref{a} like normal. You can also add a prefix:

\externaldocument[I-]{chapterI}

then you can reference it as \ref{I-a} which is useful if you have identical label names in different chapters.

Note that the normal xr doesn't add hyperlinks. It only adds the label text. The zref package can be used for this. It provides the zref-xr subpackage which gives you the same functionality and should work fine with hyperref (after all both packages are from the same author). You only need to replace \externaldocument with \zexternaldocument as well as \ref with \zref.

Note that the xr package reads the aux file, e.g. in this case, it checks chapterI.aux for references.

[Tex/LaTex] Cross referencing between chapters of a thesis

Even if Texmaker doesn't pick up the labels from other \included files, using the label will still work, so \ref{fig:2.1 Random forest} should give the correct figure number, regardless of what subfile you're in.

(By the way, xr is not what you want. That is for adding references to completely separate documents, you are adding a reference within the same document.)

Best Answer

Related Solutions

[Tex/LaTex] Cross-referencing between different files

[Tex/LaTex] Cross referencing between chapters of a thesis

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