wording (prob graphs)

Chapter3/Figures/figure-crf-to-deal-with-sequence-problems.tex

@@ -8,7 +8,7 @@
 		\node[anchor=west,hide](yn-1)at([xshift=2em]dots.east){$y_{n-1}$};
 		\node[anchor=west,hide](yn)at([xshift=2em]yn-1.east){$y_n$};
 		
-		\node[anchor=north,draw,line width=1pt,inner sep=2pt,fill=red!30,minimum height=2em,minimum width=12em](see)at ([yshift=-3em,xshift=2em]y3.south){$X=(x_1,x_2,\ldots,x_{n-1},x_n)$};
+		\node[anchor=north,draw,line width=1pt,inner sep=2pt,fill=red!30,minimum height=2em,minimum width=12em](see)at ([yshift=-3em,xshift=2em]y3.south){$\mathbf{X}=(x_1,x_2,\ldots,x_{n-1},x_n)$};
 		\node[anchor=south,font=\footnotesize] at ([yshift=1em,xshift=2em]y3.north){待预测的隐藏状态序列};
 		\node[anchor=north,font=\footnotesize] at ([yshift=-1em]see.south){可见状态序列};