我有两个问题:
- 我怎样才能将节点放置在圆弧中间、上方?
- 圆弧中箭头的末端是黑色而不是橙色,如何设置尖刺的颜色?
这是乳胶代码。
\begin{tikzpicture}[auto, node distance=3cm,>=latex', scale=0.4 ,every
node/.style={transform shape}]
% Draw axes
\draw[->] (xyz cs:x=-5) -- (xyz cs:x=5) node[above] {$y$};
\draw[->] (xyz cs:y=-5) -- (xyz cs:y=5) node[right] {$x$};
\foreach \a in {20, 140, 250}
\draw[draw=blue] (0, 0) -- (\a:4.5);
\draw[draw=orange,->] (0,1) arc (90:20:1cm) node[midway,above]{$\theta$};
\end{tikzpicture}