I'm trying to have a sideways table at the end of my document, however I can't seem to get it to centre to the A4 page perfectly like intended.
Here's my preamble:
\documentclass[11pt,a4paper,twoside, twocolumn]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[UKenglish]{babel}
\usepackage[UKenglish]{isodate}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{lmodern}
\usepackage[bottom]{footmisc}
\usepackage{bm}
\usepackage{url}
\usepackage{paralist}
\usepackage{lipsum}
\usepackage{siunitx}
\usepackage{lettrine}
\usepackage{graphicx}
\usepackage{tabu}
\usepackage{booktabs}
\usepackage{rotating}
\usepackage{tabularx}
\newcolumntype{C}{>{\centering\arraybackslash}X} % centered "X" column type
\usepackage{multirow}
\usepackage{array}
\newcolumntype{L}{>{\centering\arraybackslash}m{2.75cm}}
\usepackage{todonotes}
\usepackage{titling}
\setlength{\droptitle}{-2em}
\title{\huge \textbf{Not relevant}}
\author{Not relevant}
\date{6$^{\text{th}}$ March 2013}
\usepackage{csquotes}
\usepackage[style=authoryear, backend=biber]{biblatex}
\addbibresource{endogenous.bib}
\usepackage{cleveref}
\usepackage[font=footnotesize,labelfont={bf,sf},justification=centering]{caption}
\usepackage{fancyhdr}
\usepackage{microtype}
And here's the document itself:
\begin{document}
\pagestyle{fancy}
\lhead{}
\chead{}
\rhead{\textsc{Test}}
\lfoot{}
\cfoot{}
\rfoot{\thepage}
\renewcommand{\headrulewidth}{0.4pt}
\renewcommand{\footrulewidth}{0.4pt}
\clearpage
\thispagestyle{empty}
\begin{sidewaystable*}[t!]
\centering
\small
\begin{tabu}{Lccccccccccccccc}
\toprule
& \multicolumn{3}{c}{De6} & \multicolumn{3}{c}{19q2} & \multicolumn{3}{c}{1q13} & \multicolumn{3}{c}{6q26} & \multicolumn{3}{c}{12q12} \\
\midrule
\rowfont{\footnotesize}
& AA & Aa & aa & AA & Aa & aa & AA & Aa & aa & AA & Aa & aa & AA & Aa & aa \\
\rowfont{\tiny}
& ($+$/$-$) & ($+$/$-$) & ($-$/$-$) & ($+$/$-$) & ($+$/$-$) & ($-$/$-$) & ($+$/$-$) & ($+$/$-$) & ($-$/$-$) & ($+$/$-$) & ($+$/$-$) & ($-$/$-$) & ($+$/$-$) & ($+$/$-$) & ($-$/$-$) \\
\midrule
\rowfont{\footnotesize}
{\small Observed number ($O$)} & 0& 4& 20& 1& 1& 11& 0& 1& 9& 1& 3& 5& 1& 0& 12 \\[2ex]
\rowfont{\footnotesize}
{\small Percentage} & 0.00\%& 16.67\% &83.33\% &7.69\% &7.69\% &84.62\% &0.00\% &10.00\% &90.00\% &11.11\% &33.33\% &55.56\%& 7.69\%& 0.00\%& 92.31\% \\[2ex]
{\small p frequency} & \multicolumn{3}{c}{0.0833} & \multicolumn{3}{c}{0.115} & \multicolumn{3}{c}{0.05} & \multicolumn{3}{c}{0.278} & \multicolumn{3}{c}{0.0769} \\
{\small q frequency} & \multicolumn{3}{c}{0.917} & \multicolumn{3}{c}{0.885} & \multicolumn{3}{c}{0.95} & \multicolumn{3}{c}{0.722} & \multicolumn{3}{c}{0.923} \\
\cmidrule{2-16}
& $p^2$ & $2pq$ & $q^2$ & $p^2$ & $2pq$ & $q^2$ & $p^2$ & $2pq$ & $q^2$ & $p^2$ & $2pq$ & $q^2$ & $p^2$ & $2pq$ & $q^2$ \\
\cmidrule{2-16}
\rowfont{\footnotesize}
{\small Expected genotype frequency}& 0.006 & 0.152 & 0.840 & 0.013 & 0.204 & 0.782 & 0.003 & 0.095 & 0.903 & 0.077 & 0.401 & 0.522 & 0.006 & 0.142 & 0.852 \\ [2ex]
\rowfont{\footnotesize}
{\small Expected no. of genotype ($E$)} & 0.167 & 3.67 & 20.2 & 0.173 & 2.65 & 10.2 & 0.025 & 0.95 & 9.03 & 0.694 & 3.61 & 4.69 & 0.0769 & 1.85 & 11.08 \\[2ex]
\rowfont{\footnotesize}
{\large $\frac{(O-E)^2}{E}$} & 0.167 & 0.03 & 0.001 & 3.95 & 1.03 & 0.067 & 0.025 & 0.003 & $6.93 \times 10^{-5}$ & 0.134 & 0.103 & 0.02 & 11.07 & 1.85 & 0.077 \\
\cmidrule{2-16}
Total $\chi^{2}$ value & \multicolumn{3}{c}{\textbf{0.198}} & \multicolumn{3}{c}{\textbf{5.05}} & \multicolumn{3}{c}{\textbf{0.03}} & \multicolumn{3}{c}{\textbf{0.26}} & \multicolumn{3}{c}{\textbf{13}} \\
\bottomrule
\end{tabu}
\caption{Hardy-Weinburg calculations for each insertion sequence}
\label{tab:hardyweinburg}
\end{sidewaystable*}
\clearpage
\end{document}
Using the above it's outputting like so:

As you can see the table isn't centred on the page vertically, when viewing horizontally it appears too far to the right of centre.
Is there a way of changing this?

\usepackage[showframe]{geometry}to your preamble in order to visualise this). Either 1) locally reduce the font size, or 2) locally decrease the margins using\newgeometry, or 3) modify your table to make it fit on the page. – jub0bs Mar 13 '13 at 22:17