摘要: 第1程序 What's a matrix(矩阵)? 100xp In R, a matrix is a collection of elements of the same data type (numeric, character, or logical) arranged into a fixe 阅读全文
posted @ 2016-08-30 10:44 Joe.Smith 阅读(332) 评论(0) 推荐(0) 编辑