摘要: > text <- c("we are the world", "we are the children") > sub("w", "W", text) [1] "We are the world" "We are the children" > sub("W","w",text) [1] "we 阅读全文
posted @ 2018-03-22 17:16 nkwy2012 阅读(23206) 评论(0) 推荐(0) 编辑
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posted @ 2018-03-22 13:19 nkwy2012 阅读(4) 评论(0) 推荐(0) 编辑