# compile only a certain specified part of the whole document?

I know there is a package called comment, which can let latex ignore some text.

How can I do the inverse? I want to compile just a small segment of the whole tex file and let latex ignore other part.

EDIT

This is desirable when I'm looking for a specific coordinate in drawing on an image.

But I do not want an solution just for handling figures.

I've been using ktikz for drawing tikz figures, and the following to generate the pdf image and the complete latex source.

`

#!/bin/bash

filename="${1%.*}"".TeXTiKz" echo "\ \documentclass{article} \ \usepackage{pgfplots} \ \usepackage{tikz} \ \usepackage[active,tightpage]{preview} \ \PreviewEnvironment{tikzpicture} \ \setlength\PreviewBorder{2mm} \ \begin{document} \ \input{$1} \

\end{document}" \
> $filename echo$filename

pdflatex $filename - You can use ktikz to draw Tikz images. – giordano Jun 12 '13 at 12:01 If your document is very long, you can split it into several TeX files, use \include on the main document to join them all and \includeonly{name} on the preamble to compile just the content of name.tex. – Luan Resende Jun 12 '13 at 12:04 @giordano, Thank you. I do use ktikz. But when it's not about drawing or figures, is includeonly the only way to do this (as per @LuanResende 's comment)? – Hongying Jun 12 '13 at 12:36 @Hongying well, that's a possibility. But if you want to compile only a small region includeonly isn't really useful. You can try some editors allowing preview of regions of the document, such as Emacs+AUCTeX or TeXstudio – giordano Jun 12 '13 at 12:40 @giordano, Oh, I never know that under Emacs we can preview regions of the document. By the way, I use Latex-Box with vim, but maybe I should view Emacs+AUCTeX as a powerful latex editor rather a general text editor or an operating system (just joking. Thank you. :) ). – Hongying Jun 12 '13 at 13:00 ## 1 Answer A possible solution are Makefiles: main = main-doc plots-dir = plots # all tikz-pictures in separated *.tex in folder plots plots-tex :=$(wildcard $(plots-dir)/*.tex) vpath %.tex$(plots-dir)

# rule to make all plots
make_tikz_plots : $(plots-tex:.tex=-preview.pdf) # 'packages.tex' can be the same as used in 'main-doc.tex' but should # at least contains the needed TikZ package and desired libraries # '\externaldocument' is from the package 'xr' which will use # 'main-doc.aux' to create the right '\ref' etc plots/%-preview.pdf : %.tex @echo Generating$<
pdflatex --shell-escape --jobname="$(<:.tex=-preview)" \ "\documentclass[compress,10pt]{beamer}"\ "\input{packages}"\ "\externaldocument{$(main)}"\
"\begin{document}\tikzset{external/force remake}"\
"\input{\$(<:.tex=)}\end{document}"

All TikZ-pictures are saved in individual *.tex-files in a directory plots. Running make will generate for every of these file a *-preview.pdf using the packages defined in packages.tex. With the package xr even references will be correctly resolved from the main document main-doc.tex.