四种统计学作图的matlab实现方式，分别是箱线图，茎叶图，QQ图和频率直方图。直接输入数据即可运行，具有初步分析数据偏度、峰度、正态性的广泛应用。-Four kinds of statistical mapping matlab implementation, namely, box plots, stem and leaf diagram, QQ diagram and frequency histograms. Input data can be run directly, with a