Gap after table in LaTeX

I notice that there is some gap after my table. See the following snapshot:

My LaTeX code is:

\begin{table}[htb]  
\caption{Error rates VS training size in AdaBoosted stump, SVM and kNN. \label{tab:examplecount8000errerrplot}}  
\begin{center}  
\begin{tabular}{c c}  
\includegraphics[scale=0.4]{../boost.eps}   
&  
\includegraphics[scale=0.4]{../svm.eps}   \\    
\includegraphics[scale=0.4]{../knn.eps}   
& \\    
\end{tabular}  
\end{center}  
\end{table}     
%  
\subsection{Feature Numbers}

Is the gap normal or how can I reduce the gap to be normal?

Instead of centering the tables with the {center} environment, try to use the \centering macro. I should be something like

\begin{table}
\centering
...
\end{table}