r语言TeachingDemos包绘制黑白脸谱图

r语言TeachingDemos包绘制黑白脸谱图
代码实现如下：
install.packages(“TeachingDemos包”)#下载TeachingDemos包
library(“TeachingDemos”) #加载TeachingDemos包
faces2（x，ncols = 7）#x代表任意数据框，ncols = 7表示脸图按七列显示
范例结果如下：