[Latex]PGF and Tikz 中label的使用

tikz一般使用node来标注文本,但也可以试试label属性.

label=degree:<text>degree为角度,也可以是left(180度),right(0度),above(90度),below(270或-90度);text为需要添加的文本.

例如:

\tikz\node [circle,draw,label=60:$60^\circ$,label=below:$-90^\circ$] {my circle};~\\\tikz\node [rectangle,rounded corners=1mm,draw,label=120:$120^\circ$,label=below:$-90^\circ$] {my rectangle};~\\\begin{tikzpicture}\coordinate [label=left:\textcolor{blue}{$A$}] (A) at (0,0);\coordinate [label=right:\textcolor{blue}{$B$}] (B) at (1.25,0.25);\draw[blue] (A) -- (B);\end{tikzpicture}

结果如下:

再看一个例子:

\begin{tikzpicture}%辅助网格\draw  [dashed,step=1](0,0)grid(2,2);%标注一个圆点,inner sep表示园内文字和边界的空白\node [circle,fill=red,inner sep=2pt,label=above:$(1\text{,}2)$] (A) at(1,2) {$A$};%标注一个矩形,inner sep表示园内文字和边界的空白\node [rectangle,fill=blue,inner sep=3pt,label=below:$(0\text{,}0)$] (O) at(0,0) {$o$};%标注一个圆角矩形,inner sep表示园内文字和边界的空白\node [rectangle,rounded corners=1mm,fill=blue,inner sep=4pt,label=135:$(1\text{,}1)$] (B) at(1,1) {$B$};\end{tikzpicture}

图形如下: