graphviz probability tree

probability_tree.dot

# Generate image by: dot -Tpng -o probability_tree.png probability_tree.dot

digraph probability_tree {
    s [label=""]
    male [label="男"]
    female [label="女"]
    y1 [label="穿凉鞋"]
    y2 [label="穿凉鞋"]
    n1 [label="不穿凉鞋"]
    n2 [label="不穿凉鞋"]
    s -> male [label="2/3"];
    s -> female [label="1/3"];
    male -> y1 [label="1/2"];
    male -> n1 [label="1/2"];
    female -> y2 [label="2/3"];
    female -> n2 [label="1/3"];
}