R language uses the aggregate function to calculate the group mean (median, count) and use the order function to sort, and use the barplot function to visualize the sorted data bar chart

R language uses the aggregate function to calculate the group mean (median, count) and use the order function to sort, and use the barplot function to visualize the sorted data bar chart

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Origin blog.csdn.net/zhongkeyuanchongqing/article/details/122234591