绘制盒式图
You want to create a box plot of your data. 公卫百科
Use boxplot(x), where x is a vector of numeric values.typical box plot:
? The thick line in the middle is the median.
? The box surrounding the median identifies the first and third quartiles; the bottom
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of the box is Q1, and the top is Q3.
? The “whiskers” above and below the box show the range of the data, excluding
outliers. 公卫人
? The circles identify outliers. By default, an outlier is defined as any value that is
farther than 1.5 × IQR away from the box. (IQR is the interquartile range, or
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Q3 ? Q1.) In this example, there are three outliers.
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