[Tex/LaTex] Align table caption with left border of longtable

captionshorizontal alignmentlongtabletables

Subj.

I cannot use singlelinecheck=off because it aligns it to the left border of the page.
And why table is too narrow?

\documentclass[12pt,a4paper,oneside]{article}
\usepackage[left=35mm,right=15mm,top=2cm,bottom=2cm,bindingoffset=0cm]{geometry}
\usepackage[utf8x]{inputenc} % указать кодировку русского текста
\usepackage[russian]{babel} % указать, что язык текста - русский

\usepackage{cmap}

\usepackage{makeidx}
\makeindex

\usepackage{indentfirst} 
\setlength{\parindent}{1.25cm}

\usepackage{caption}
\captionsetup[table]{labelsep=endash}

\usepackage{ltablex}
\usepackage{lipsum}
\begin{document}
    \keepXColumns
        \begin{tabularx}{\textwidth}{| l | X |} 

        \caption{A long description of this awesomest table ever. No, seriously.}\\
        \hline 
        First & Second\\ \hline \hline
        \endfirsthead
        \captionsetup{singlelinecheck=off}
        \caption{A short one}\\
        \hline 
        First & Second\\ \hline
        \endhead
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        \end{tabularx}
\end{document}

Best Answer

I don't know why the table doesn't stretch. But here's an alternative, replacing ltablex with the more recent longtabu environment. Another longtabu example directly compared to an ltablex one can be found in the answer to Ltablex customize caption.

\documentclass[12pt,a4paper,oneside]{article}
\usepackage[left=35mm,right=15mm,top=2cm,bottom=2cm,bindingoffset=0cm]{geometry}
\usepackage[utf8x]{inputenc} % указать кодировку русского текста
\usepackage[russian]{babel} % указать, что язык текста - русский

\usepackage{cmap}

\usepackage{makeidx}
\makeindex

\usepackage{indentfirst} 
\setlength{\parindent}{1.25cm}

\usepackage{caption}
\captionsetup[table]{labelsep=endash}

\usepackage{longtable}
\usepackage{tabu}
\usepackage{lipsum}
\begin{document}
%    \keepXColumns
        \begin{longtabu} to \textwidth {| l | X |} 

        \caption{A long description of this awesomest table ever. No, seriously. Worth repeating: A long description of this awesomest table ever. No, seriously. }\\
        \hline 
        First & Second\\ \hline \hline
        \endfirsthead
        \captionsetup{singlelinecheck=off}
        \caption{A short one}\\
        \hline 
        First & Second\\ \hline
        \endhead
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        Lols & \lipsum[150] \\ \hline
        \end{longtabu}
\end{document}

Related Solutions

[Tex/LaTex] Caption spacing – table vs longtable

Load the caption package:

\documentclass[12pt]{article}
\usepackage{longtable, booktabs, graphicx, caption}
\captionsetup[table]{position=above}
\begin{document}

\begin{table}
\caption{This is the first caption}
\centering
\begin{tabular}{@{}llllll@{}}
\toprule
\textbf{Name} & \textbf{Description} & \textbf{Unit} & \textbf{Data source} & \textbf{Time frame} & \textbf{Frequency} \\
\midrule  
Name & Description & Unit & Data source & Time frame & Frequency \\
\bottomrule  
\end{tabular}
\end{table}

\begin{longtable}{@{}p{2cm}p{1.5cm}p{3.6cm}p{1.2cm}p{1.5cm}p{1.5cm}@{}}
\caption{This is the second caption} \\
\toprule 
\textbf{Author(s)} & \textbf{Area} & \textbf{Estimated relationship} & \textbf{Time frame}  & \textbf{Scope}  & \textbf{type} \\
\midrule 
\endfirsthead
\multicolumn{6}{c}{\tablename\ \thetable\ -- \textit{Continued from previous page}} \\
\toprule 
\textbf{Author(s)} & \textbf{Area} & \textbf{Estimated relationship} & \textbf{Time frame}  & \textbf{Scope}  & \textbf{ type} \\ 
\midrule 
\endhead
\midrule 
\multicolumn{6}{r}{\textit{Continued on next page}} \\ 
\endfoot 
\bottomrule 
\endlastfoot
name & area & relationship & time & scope &  type \\
\end{longtable} 
\end{document}

Don't use the center environment inside table, but \centering
Don't use the center environment around longtable: the table will appear centered by default
Use \resizebox only as a last resort
Narrow p columns may be better handled if you add \raggedright, which you can do with the array package:
```
>{\raggedright\arraybackslash}p{3.6cm}
```
would be a good declaration for your third longtable column (add \usepackage{array} to your preamble.

enter image description here

[Tex/LaTex] longtable caption formatting

I don't know what document class you are using, but reading your question it surely loads setspace and uses \doublespacing.

A way to avoid loading the caption package to customize the longtable caption spacing is to load the etoolbox package and put the following line in your preamble:

\AtBeginEnvironment{longtable}{\singlespacing}

In this way you will have single spacing inside all your longtables.

Note also the line

\setlength{\LTcapwidth}{\linewidth}

to make the longtable caption span over the whole line

\documentclass{article}
\usepackage{longtable}
\usepackage{setspace}
\usepackage{lipsum} % just for the example

\usepackage{etoolbox}
\AtBeginEnvironment{longtable}{\singlespacing}

\setlength{\LTcapwidth}{\linewidth}

\begin{document}

\doublespacing

\lipsum[1]

\begin{table}[h]
    \centering
    \begin{tabular}{llll}
        1 & 1 & 1 & 1\\
        1 & 1 & 1 & 1
    \end{tabular}
    \caption{Table very very very very very very very very very very very very very long caption}
    \label{table}
\end{table}

\begin{longtable}{llll}
    1 & 1 & 1 & 1\\
    1 & 1 & 1 & 1\\
    \\
    \caption{Longtable very very very very very very very very very very very very very long caption}
    \label{longtable}
\end{longtable}

\lipsum[1-2]

\end{document}

Output:

enter image description here

EDIT

If you get any error, it means that your document class doesn't load setspace.

In this case, replace the line

\AtBeginEnvironment{longtable}{\singlespacing}

with

\AtBeginEnvironment{longtable}{\linespread{1}\selectfont}

and it should be fine.

Best Answer

Related Solutions

[Tex/LaTex] Caption spacing – table vs longtable

[Tex/LaTex] longtable caption formatting

EDIT

Related Question