# 基础作图法绘制馅饼销售饼图、点图和条形图
layout(matrix(c(1, 2, 1, 3), 2)) # 拆分作图区域
par(mar = c(4, 4, 0.2, 0.2))
pie.sales = c(0.12, 0.3, 0.26, 0.16, 0.04, 0.12)
names(pie.sales) = c("蓝莓", "樱桃", "苹果",
                     "波士顿奶油", "其它", "香草奶油")
pie.col = c("purple", "violetred1", "green3",
             "cornflowerblue", "cyan", "white")
pie.sales = sort(pie.sales, decreasing = TRUE) # 排序有助于可读性
pie(pie.sales, col = pie.col)
dotchart(pie.sales, xlim = c(0, 0.3))
barplot(pie.sales, col = pie.col, horiz = TRUE,
        names.arg = "", space = 0.5)
