[Tex/LaTex] Algorithm caption should be on top and and flushed left

captionshorizontal alignment

I want the caption of my algorithm to be on top and flushed left:

\documentclass{article}
\usepackage[plain]{algorithm}
\usepackage{algpseudocode}
\begin{document}

\begin{algorithm}
\caption{Sketch of our Compression Algorithm}
\label{fig:GENIDEA}
\begin{algorithmic}[1]
\While{Input contains characters}
\State Find matching reference block $B$ for current input position
\State Perform referential compression with respect to $B$ until we cannot find ``long'' matches anymore
\EndWhile
\end{algorithmic}
\end{algorithm}
\end{document}

Best Answer

"on top" can be realized using \restylefloat offered by the float package which is used by the algorithm package. (Unfortunately the algorithm package does not offer an package option plaintop for that.)

"flushed left" can be realized using \captionsetup[algorithm]{...} offered by the caption package.

\documentclass{article}
\usepackage{algorithm}
\usepackage{algpseudocode}

% Change float style of algorithm from "ruled" to "plaintop"
\floatstyle{plaintop}
\restylefloat{algorithm}

% Make algorithm captions left-aligned
\usepackage{caption}
\captionsetup[algorithm]{singlelinecheck=off}

\begin{document}
\begin{algorithm}
\caption{Sketch of our Compression Algorithm}
\label{fig:GENIDEA}
\begin{algorithmic}[1]
\While{Input contains characters}
\State Find matching reference block $B$ for current input position
\State Perform referential compression with respect to $B$ until we cannot find ``long'' matches anymore
\EndWhile
\end{algorithmic}
\end{algorithm}
\end{document}

enter image description here

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[Tex/LaTex] Table caption should be left aligned

Seems like you want the captions to have the same width than the width of its figure/table. If this is the case, you can use the \ffigbox, and \ttabbox commands from the floatrow package. A little example:

\documentclass{article}
\usepackage{floatrow}
\usepackage[labelsep=space]{caption}

\DeclareFloatFont{tiny}{\tiny}
\floatsetup[table]{font=footnotesize,capposition=top}

\newcommand\Text{text text text text text text text}% just for the example

\begin{document}

\begin{figure}[!ht]
\ffigbox[\FBwidth]
{\caption{A figure with its caption having equal width to the figure width}\label{fig:test1}}
{\rule{4cm}{2cm}}
\end{figure}

\begin{table}[!ht]
\ttabbox[\FBwidth]
{\caption{A table with its caption having equal width to the table width}\label{fig:test1}}
{\begin{tabular}{p{3cm}p{3cm}}
\Text\Text & \Text\Text \\
\Text\Text & \Text\Text 
\end{tabular}
}
\end{table}

\end{document}

enter image description here

[Tex/LaTex] placing caption on the top right or top left –

As Harish Kumar mentioned in his comment. you can use \sidecaptionvpos to control the vertical placement of the caption and the innercaption package option to place the captions right on left pages and left on right pages (as your example seems to show). In the following example I also used \subcaptionbox from the subcaption package to place the subfigures; the demo option for graphicx simply replaces the images with black rectangles (do notuse that option in your actual code):

\documentclass{article}
\usepackage[demo]{graphicx}
\usepackage{caption}
\usepackage{subcaption}
\usepackage[innercaption]{sidecap}
\usepackage{lipsum}

\sidecaptionvpos{figure}{t}
\begin{document}

\begin{SCfigure}
  \centering
  \begin{minipage}{5.5cm}
  \subcaptionbox{A subfigure\label{fig:sub1}}{\includegraphics{name1}}\\
  \subcaptionbox{Another subfigure\label{fig:sub2}}{\includegraphics{name2}}
  \end{minipage}
  \caption{\protect\lipsum[2]}
\end{SCfigure}

\end{document}

enter image description here

Best Answer

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[Tex/LaTex] Table caption should be left aligned

[Tex/LaTex] placing caption on the top right or top left –

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