tweak

Signed-off-by: Terence Parr <[email protected]>

Author: parrt

examples/matrix-calculus/index.xml

@@ -1232,9 +1232,9 @@ And for the partial of the cost function itself we get:
  	0 & \mathbf{w} \cdot \mathbf{x}_i + b \leq 0\\
  	2(\mathbf{w}\cdot\mathbf{x}_i+b-y_i) & \mathbf{w} \cdot \mathbf{x}_i + b > 0\\
  \end{cases}\\\\
- & = & \begin{cases}
+& = & \frac{2}{N} \sum_{i=1}^N \begin{cases}
 	0 & \mathbf{w} \cdot \mathbf{x}_i + b \leq 0\\
-	\frac{2}{N} \sum_{i=1}^N (\mathbf{w}\cdot\mathbf{x}_i+b-y_i) & \mathbf{w} \cdot \mathbf{x}_i + b > 0\\
+	\mathbf{w}\cdot\mathbf{x}_i+b-y_i & \mathbf{w} \cdot \mathbf{x}_i + b > 0\\
  \end{cases}
 \end{eqnarray*}
 </latex>