LaTex中使用循环连续绘图的例子

总有需要在LaTex中使用循环连续绘图的时候,下面的代码使用了tikz宏包,计数器等技术.

先看代码:

%%====================================================
\begin{frame}[fragile]
	由 $3$ 个人群可以构成$2^3 = 8$张 \remph{人际关系图},只需分析如下 \remph{$4$}张图即可:\\[12pt] %
	\setcounter{maincounter}{0}%设置计数器的值
	%每次增加一个值用\stepcounter{maincounter}
	\begin{tikzpicture}[line width = 1.0pt]
	\pgfmathsetmacro{\h}{1.4}   %两点的水平间距
	\pgfmathsetmacro{\v}{1.4}   %两点的垂直间距
	% %------------------------------------------------------
	\foreach \r/\c in {0/0,2/0,4/0,6/0}  
	{	
		\stepcounter{maincounter} %增加计数器的值
		\setcounter{secondcounter}{0}%设置计数器的值
		%定义原点坐标
		\coordinate  (P0) at (\r,\c);	
		
		\path (P0)  node[circle,fill=red,inner sep=2pt](a){$a$};  
		\path (a)+(\h,0 )  node[circle,fill=red,inner sep=2pt](b){$b$}; 
		\path ($ (a)!0.5! (b) $)+(0,\v)   node[circle,fill=red,inner sep=2pt](c){$c$}; 
		\path ($ (a)!0.5! (b) $)+(0,-0.5)   node (T){ $\left( \themaincounter \right) $}; 
		%画直线  
		\foreach \from/\to in {a/b,a/c,b/c}  
		{
			\stepcounter{secondcounter} %增加计数器的值
			\ifthenelse{\value{secondcounter}<\value{maincounter}}{\draw[dashed] (\from) -- (\to)  ;}{\draw[blue] (\from) -- (\to)  ;}
		}
		
	}
	\end{tikzpicture}
\end{frame}
           

下面是结果: