# 指定数据集
attach(iris)
# 4.1 basic plot
plot(Sepal.Width) # 散点图
table(Sepal.Width) # 频数统计表
plot(table(Sepal.Width), # table统计频数分布
main = "frequency of sepal width", # main定义图标题
xlab = "sepal width", # x轴标签
ylab = "number of items") # y轴标签
# 4.2 save plot(可选格式:png、pdf、jepg)
dev.copy(device=pdf,file="iris_plot.pdf",width=11,height=9)
dev.off()
# 4.3 othersplot