摘要: # sorting examples using the mtcars datasetattach(mtcars)# sort by mpgnewdata <- mtcars[order(mpg),]# sort by mpg and cylnewdata <- mtcars[order(mpg, 阅读全文
posted @ 2015-01-28 15:09 emanlee 阅读(3484) 评论(0) 推荐(0)