latex合理使用循环和判断选择语句进行绘图的例子

来源：互联网发布：python zip破解不好用编辑：程序博客网时间：2024/05/17 23:07

当图形元素某些可重现时,在latex中合理使用循环和判断选择语句进行绘图,会非常省事.

下面给个的例子:

%%====================================================\begin{frame}[fragile]\small由 $4$ 人可构成$2^6 = 64$张 \remph{人际关系图},其中的 $8$ 张图:\\[12pt] %% %------------------------------------------------------\setcounter{maincounter}{0}%设置计数器的值% %------------------------------------------------------\begin{tikzpicture}[line width = 1.2pt]\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 {0/0,2/0,4/0,6/0,0/2,2/2,4/2,6/2}  {\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 (b)+(0,\v )  node[circle,fill=red,inner sep=2pt](c){$c$}; \path (a)+(0,\v )  node[circle,fill=red,inner sep=2pt](d){$d$}; \path ($ (a)!0.5! (b) $)+(0,-0.25)   node (T){ $\left( \themaincounter \right) $}; %画虚线\foreach \from/\to in {a/b,b/c,c/d,d/a,a/c,b/d}  {\stepcounter{secondcounter} %增加计数器的值\ifthenelse{\value{maincounter} < 8}{\ifthenelse{\value{secondcounter} < \value{maincounter}}{\draw[blue,very thick] (\from)--(\to) ; }{\draw[dashed,thin] (\from)--(\to) ;}}{\draw[dashed,thin] (\from)--(\to) ;}%------------------------------}%------------------------------\ifthenelse{\value{maincounter} = 8}{\draw[green,very thick] (a)--(b)--(c)--(a) ;  }{}}\end{tikzpicture}\end{frame}

上面使用了tikz,计数器等,绘制的图形结果如下:

0 0