Insert Scatter Matrix small description

1 files changed, 4 insertions, 1 deletions

diff --git a/report/paper.md b/report/paper.md
index 253b1ba..e756f69 100755
--- a/report/paper.md
+++ b/report/paper.md
@@ -332,7 +332,10 @@ vaying between 0.11s(low M_pca) and 0.19s(high M_pca).
 \end{center}
 \end{figure}
 
-ADD RANK OF SCATTER MATRICES
+The scatter matrices obtained, S\textsubscript{B}(scatter matrix between classes) and 
+S\textsubscript{W}(within-class scatter matrix), respectively show ranks of at most c-1(51) and
+N-c(312 maximum for our standard 70-30 split). The rank of S\textsubscript{W}
+will have the same value of M_pca for M_pca$\leq$N-c.
 
 Testing with M_lda=50 and M_pca=115 gives 92.9% accuracy. The results of such test can be
 observed in the confusion matrix shown in figure \ref{ldapca_cm}.