如何在Latex中畫這種根樹圖形？

01-12

在用Latex寫論文時需要如下形式的根樹，請問可以用某些宏包實現嗎？

方法很多。

用基本的 tikz 宏包就行。具體的宏包使用說明見 http://mirrors.ctan.org/graphics/pgf/base/doc/pgfmanual.pdf

粗暴點的就直接上坐標。

% usepackage{tikz}


egin{tikzpicture}[line width = 1pt,

                    solid/.style = {circle, draw, fill = black, minimum size = 0.3cm},

                    empty/.style = {circle, draw, fill = white, minimum size = 0.3cm}]
ode [solid] (A) at (1,1) {};
ode [empty, label = right:$j_2$] (B) at (3,1) {};
ode [empty, label = right:$j_1$] (C) at (2,0) {};
draw (A) -- (C);

draw (B) -- (C);

end{tikzpicture}

節點多的話還是用下面的方法吧。

% usepackage{tikz}


egin{tikzpicture}[grow"=up,

                    line width = 1pt,

                    vertex/.style={minimum size=2pt,fill,draw,circle},

                    open/.style={fill=none},

                    sibling distance=1.5cm,level distance=.75cm,

                    leaf/.style={label={[name=#1]right:$#1$}},auto]
ode [vertex, open, leaf = j_1] (root) {}

child {node[vertex] {}}

child {node[vertex,open, leaf = j_2] {}};

end{tikzpicture}

還有專門用來畫樹的宏包，比如 tikz-qtree 也可以。

PSTricks也是可以的