\begin{table}%t2
%\centering
\par
  \caption{Mean absolute errors on the evaluation set of 19~000 spectra in
    the RR model (plotted in Fig.~\ref{phot}). The first line is for the full
    data set (training and evaluation data). The second and third are just for
    the evaluation sets. The third line is for a model which included the four
    photometric colours as additional model inputs (predictors).}
  \label{t_GlobalRR}
        \begin{tabular}[h]{llllll}
        \hline\hline 
        Set & PCs & + & $E_{\log~T_{\rm eff}}$ & $E_{\log~g}$& $E_{\rm
          [Fe/H]}$ \\ 
        \hline  
        38~731 & $25+25$  &    & 0.0090 & 0.2699 & 0.1339\\ 
        \hline  
        19~000 &$25+25$   &    & 0.0126 & 0.3644 & 0.1949\\
                &$25+25$ &phot& 0.0082 & 0.2791 & 0.1616\\ 
       \hline
       \end{tabular}
\end{table}