       spectra3&      knn&    &  -59&  -61&  -62&  -62\\
               &  knn+cnn&    &  -51&  -54&  -53&  -58\\
               &  knn+mcs&    &  -33&  -24&   -6&   -1\\
               &  knn+psc&    &  -61&  -64&  -59&  -59\\
\hline
       spectra5&      knn&     &  -37&  -33&  -35&  -38\\
               &  knn+cnn&   -6&  -22&  -25&  -24&  -30\\
               &  knn+mcs&   -3&  -21&  -16&  -12&  -14\\
               &  knn+psc&   -9&  -37&  -37&  -35&  -40\\
\hline
      spectra10&      knn&    &  -11&  -12&  -16&  -17\\
               &  knn+cnn&    0&   -6&   -9&  -11&  -12\\
               &  knn+mcs&    0&   -6&   -6&   -6&   -6\\
               &  knn+psc&   -1&  -11&  -16&  -16&  -16\\
\hline
      spectra20&      knn&    1&   -3&   -4&   -6&   -4\\
               &  knn+cnn&    0&   -1&   -3&   -3&   -4\\
               &  knn+mcs&    0&   -1&   -3&   -3&   -1\\
               &  knn+psc&    0&   -3&   -4&   -6&   -6\\
\hline 
