成对数据# 成对 \((x, y)\) ,表格 \((var\_0, \cdots, var\_n)\) 和函数式 \(f(x)=y\) 数据的图表. plot(x, y) plot(x, y) scatter(x, y) scatter(x, y) bar(x, height) bar(x, height) stem(x, y) stem(x, y) fill_between(x, y1, y2) fill_between(x, y1, y2) stackplot(x, y) stackplot(x, y) stairs(values) stairs(values)