Hello, R Users, I have a list (say listexp) of 10,000 elements, each of which consists of a matrix (5X6). It likes: $"a" trt1rep1 trt1rep2 trt2rep1 trt2rep2 ctlrep1 ctlrep2 [1,] 50 54 98 89 40 45 [2,] 60 65 76 79 34 43 [3,] 86 83 34 45 38 34 [4,] 67 78 88 98 45 41 [5,] 55 59 77 88 56 66 $"b" trt1rep1 trt1rep2 trt2rep1 trt2rep2 ctlrep1 ctlrep2 [1,] 55 54 88 86 42 40 [2,] 66 65 86 99 44 48 [3,] 80 86 44 55 38 44 [4,] 77 78 98 92 35 41 [5,] 50 53 87 88 46 56