obj_A <- list(matrix(NA,nrow = 2,2), matrix(NA,nrow = 3,2),matrix(NA,nrow = 2,1));
## 物件結構 list中的各個矩陣維度有可能也是不一樣
## 想填入的值
num <- c(1:12)
## 希望結果是
res_A <- list(matrix(1:4,nrow = 2,2), matrix(5:10,nrow = 3,2),matrix(1:2,nrow = 2,1));
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