3行2列的矩阵A,修改A的列号为"甲","乙","丙"的命令是:
选项:
A:rowname(A) <-c("甲","乙","丙");
B:rownames(A) <-c("甲","乙","丙");
C:colname(A) <-c("甲","乙","丙");
D:colnames(A) <-c("甲","乙","丙")
发布时间:2024-06-09 01:00:34