摘要:
summary()sapply(x,fun,options):对数据框或矩阵中的每一个向量进行统计meansd:标准差var:方差min:max:median:length:range:quantile:vars <- c("mpg", "hp", "wt")head(mtcars[vars])su... 阅读全文
摘要:
#安装vcd包,数据集在vcd包中library(vcd)counts <- table(Arthritis$Improved)counts# 垂直barplot(counts, main = "Simple Bar Plot", xlab = "Improvement", ylab = "... 阅读全文
摘要:
提示以上错误,然后在pycharm中的文件内容和实际内容不一致去我的文档-.PyCharm-system_cache,全部删除 阅读全文