
\section{Results}

\begin{itemize}
\item 20\% of song ratings is the test set, the other 80\% is the training set, for each user. The number of users evaluated is 53.
\item For each song in the  test set, we look up if the song is included or not
in the produced top-N recommendations.
%\item Examples of classification results are shown below:
\end{itemize}

\begin{center}
\resizebox*{1.0\columnwidth}{!}{

	\begin{tabular}{c| c| c| c| c} % centered columns (4 columns)
		\hline\hline %inserts double horizontal lines
		Recommender & Precision & Recall & F1 & Accuracy \\ [0.5ex] % inserts table
		%heading
		\hline % inserts single horizontal line
		Content-based (baseline) & 0.275 $\pm$ 0.087 & 0.010 $\pm$ 0.003 & 0.020 $\pm$ 0.007 & 0.681 $\pm$ 0.008 \\ % inserting body of the table
		Hybrid (discrete EDA) & \textbf{0.391 $\pm$ 0.182} & \textbf{0.013 $\pm$ 0.007} & \textbf{0.025 $\pm$ 0.013} & \textbf{0.685 $\pm$ 0.009} \\
		Hybrid (continuous UMDA) & 0.318 $\pm$ 0.142 & 0.011 $\pm$ 0.005 & 0.021 $\pm$ 0.011 & 0.683 $\pm$ 0.009 \\ [1ex] % [1ex] adds vertical space
		\hline %inserts single line
	\end{tabular}

}
\end{center}
%\begin{center}
%\begin{tabular}{c@{ }c@{ }c@{ }c@{ }c@{ }c@{ }c}
%bananas &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/bananas2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/bananas2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/bananas2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/bananas2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/plums2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/bananas2.eps}} \\
%plums &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/plums2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/bananas2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/plums2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/plums2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/plums2.eps}} &
%\resizebox*{0.12\columnwidth}{!}{\includegraphics{images/fruit/plums2.eps}} \\
%\end{tabular}
%\end{center}
