2015年2月28日
reshape: from long to wide format（转）
摘要： This is to continue on the topic of using themelt/castfunctions inreshapeto convert between long and wide format of data frame. Here is the example I ... 阅读全文
posted @ 2015-02-28 10:00 payton数据之旅 阅读(557) 评论(0) 推荐(0) 编辑