如何检查R中两个矩阵是否相等？
当我们使用更大的矩阵并且期望数据来自相同的分布或来自相同的来源时，我们可能会期望矩阵相等。在这种情况下，我们要检查两个矩阵是否相等。可以all.equal在以下示例中所示的功能的帮助下完成此操作。
示例
M1<-matrix(1:100,ncol=10) M1输出结果
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] 1 11 21 31 41 51 61 71 81 91 [2,] 2 12 22 32 42 52 62 72 82 92 [3,] 3 13 23 33 43 53 63 73 83 93 [4,] 4 14 24 34 44 54 64 74 84 94 [5,] 5 15 25 35 45 55 65 75 86 96 [7,] 7 17 27 37 47 57 67 77 87 97 [8,] 8 18 28 38 48 58 68 78 88 98 [9,] 9 19 29 39 49 59 69 79 89 99 [10,] 10 20 30 40 50 60 70 80 90 100
示例
M2<-matrix(1:100,ncol=10) M2输出结果
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] 1 11 21 31 41 51 61 71 81 91 [2,] 2 12 22 32 42 52 62 72 82 92 [3,] 3 13 23 33 43 53 63 73 83 93 [4,] 4 14 24 34 44 54 64 74 84 94 [5,] 5 15 25 35 45 55 65 75 85 95 [6,] 6 16 26 36 46 56 66 76 86 96 [7,] 7 17 27 37 47 57 67 77 87 97 [8,] 8 18 28 38 48 58 68 78 88 98 [9,] 9 19 29 39 49 59 69 79 89 99 [10,] 10 20 30 40 50 60 70 80 90 100
all.equal(M1,M2)
[1] TRUE
示例
M3<-matrix(rpois(64,10),nrow=8) M3输出结果
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [1,] 8 7 7 9 11 13 8 9 [2,] 9 9 9 11 8 10 9 8 [3,] 7 8 9 12 15 11 9 8 [4,] 11 10 15 11 11 11 10 14 [5,] 14 13 14 8 12 12 2 16 [6,] 7 12 6 10 3 5 9 12 [7,] 13 7 15 10 4 7 8 8 [8,] 6 13 7 9 11 12 13 7
示例
M4<-matrix(rpois(64,10),nrow=8) M4输出结果
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [1,] 11 10 9 5 14 4 8 13 [2,] 12 9 15 10 11 11 11 14 [3,] 5 12 12 12 7 20 13 11 [4,] 4 12 16 17 13 9 8 14 [5,] 11 17 13 14 10 6 16 12 [6,] 14 11 8 16 10 12 7 11 [7,] 10 10 8 10 6 12 8 12 [8,] 7 15 8 10 5 11 11 5
all.equal(M3,M4)
[1] "Mean relative difference: 0.3885918"
示例
M5<-matrix(rpois(40,5),nrow=20) M5输出结果
[,1] [,2] [1,] 2 12 [2,] 5 3 [3,] 8 4 [4,] 8 7 [5,] 10 9 [6,] 7 10 [7,] 3 4 [8,] 5 9 [9,] 7 5 [10,] 2 1 [11,] 3 11 [12,] 3 5 [13,] 4 3 [14,] 9 3 [15,] 2 7 [16,] 8 9 [17,] 2 9 [18,] 7 3 [19,] 0 7 [20,] 5 6
示例
M6<-matrix(rpois(40,5),nrow=20) M6输出结果
[,1] [,2] [1,] 2 8 [2,] 6 9 [3,] 4 7 [4,] 1 2 [5,] 3 3 [6,] 2 4 [7,] 4 7 [8,] 6 6 [9,] 5 5 [10,] 3 1 [11,] 7 6 [12,] 6 6 [13,] 2 4 [14,] 7 3 [15,] 7 4 [16,] 4 4 [17,] 4 3 [18,] 3 4 [19,] 10 6 [20,] 4 6
all.equal(M5,M6)
[1] "Mean relative difference: 0.5952381"