R language uses the sum function of epidisplay package to calculate the descriptive statistical summary information of the specified variables in dataframe under different grouped variables and visual

R Language use epiDisplay Bag summ Function calculation dataframe The descriptive statistical summary information of the specified variables under different grouped variables and the visualization of the ordered dot graph （ name 、 Number of valid values 、 mean value 、 Median 、 Standard deviation 、 Maximum 、 minimum value ）

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