📅  最后修改于: 2022-03-11 14:58:23.297000             🧑  作者: Mango
Z = matrix(c(3,1,4, 1,6,5, 4,5,2), nrow=3, ncol=3)
Z
>>> [,1] [,2] [,3]
>>> [1,] 3 1 4
>>> [2,] 1 6 5
>>> [3,] 4 5 2
isSymmetric(Z)
>>> [1] TRUE