\begin{figure}[!t]
\center{

{\small
\begin{tabular}{rr|rccccc|l}\cline{3-8}
&    &      & \multicolumn{5}{c|}{Frequency of algorithms in the five bands}\\
&    &      & band 1& band 2& band 3 &band 4 &band 5&    \\\cline{3-8}
&    &  $y=$    & 1..8& 9..30& 31..50& 51..70&71..90&    \\\cline{3-8}
\multirow{9}{1mm}{\begin{sideways}\parbox{10mm}{Learners}\end{sideways}}	&    &       CART (yes)& 4& 2& 3& 1& &    \\
&    &      CART (no)& 4& 2& 3& 1& &    \\

&&      {\G}      ABE0-5NN & {\G}  & {\G} 3 & {\G} 6 & {\G} 1 & {\G} & \\
                    &&   {\G}       ABE0-1NN & {\G}  & {\G} 5 & {\G}  & {\G} 5     &{\G}\\
       &              &      {\G}   PCR &  {\G} & {\G} 4 & {\G}  & {\G} 1 & {\G} 5&\\
        &              &     {\G}   PLSR & {\G} 4 & {\G}  & {\G} 4 & {\G}  & {\G} 2&\\

                     &  &     LReg& & 1& & 3& 6&  \\
       &  &    SWR& & & 6& 2 &2&\\
                      &   &   NNet& & & 2& 2& 6&\\\cline{3-8}

\multirow{10}{1mm}{\begin{sideways}\parbox{10mm}{Pre-Processors}\end{sideways}}	      &          & SWR&2&4&1&2&\\
&             &   SFS& &7&1&1& \\

&& {\G}  none& {\G} 2& {\G} 3& {\G} 3& {\G} 1& {\G} &\\
         && {\G} log& {\G} 2& {\G} 1& {\G} 1& {\G} 3& {\G} 2&\\
        && {\G}   norm& {\G} 2& {\G} 1& {\G} 2& {\G} 2& {\G} 2&\\
	   && {\G} PCA& {\G} & {\G} 4& {\G} 3& {\G} 1& {\G} 1& \\

     && freq5bin&&1&2&1&5&\\
&& width2bin&&&3&3&3&\\
    &&  width5bin&&&3&3&3&\\
    && freq3bin&&&1&3&5&\\
\cline{3-8}
\end{tabular}
}

\caption{Frequencies counts of preprocessor and learners in the five bands of \fig{dot-plot}.
}\label{fig:freq_method}

}
\end{figure}