diff --git a/notes/01_pca/0_cov.tex b/notes/01_pca/0_cov.tex
index c204f1b..78a36a8 100644
--- a/notes/01_pca/0_cov.tex
+++ b/notes/01_pca/0_cov.tex
@@ -91,7 +91,7 @@ \subsection{Variances and Covariances}
 \resizebox{.5\textwidth}{!}{%
 \begin{tabular}{rl}
  ${\color{blue}\vec C_\mathrm{A} = \mat{1 & 0 \\ 0 & 1}}$ &  ${\color{red}\vec C_\mathrm{B} = \mat{1 & 0 \\ 0 & 2}}$\\[10mm]
- ${\color{darkgreen}\vec C_\mathrm{C} = \mat{1 & -1 \\ -1 & 1}}$ &  ${\color{byzantium}\vec C_\mathrm{D} = \mat{1 & 0.5 \\ 0.5 & 2}}$
+ ${\color{darkgreen}\vec C_\mathrm{C} = \mat{1 & -0.8 \\ -0.8 & 1}}$ &  ${\color{byzantium}\vec C_\mathrm{D} = \mat{1 & 0.5 \\ 0.5 & 2}}$
 \end{tabular}%
 }
 \end{center}
diff --git a/notes/01_pca/img/cov.pdf b/notes/01_pca/img/cov.pdf
index 68ba630..44c9bd3 100644
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diff --git a/notes/01_pca/img/scatter.pdf b/notes/01_pca/img/scatter.pdf
index 0f4f346..1f78711 100644
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