[問題] 矩陣的維度變大

[wgene (wgene)]

請問一下

假設我有原矩陣是
A=matrix(c(1,2,3,4,5,6,7,8,9),3,3)
然後我要變成5*4的矩陣,多餘的列或行要補0
即變成
A=matrix(c(1,2,3,0,0,4,5,6,0,0,7,8,9,0,0,0,0,0,0,0),5,4)
除了寫loop外, 請問有合適的function可以處理嗎?

謝謝!!

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※ 編輯: wgene (123.193.67.178 臺灣), 06/17/2022 00:48:41
→ Gjerry: B <- matrix (0, nrow =5, ncol = 4)
→ xiangying: 直接在現有矩陣加row 跟col並設成0
→ Gjerry: B[1:3, 1:3] <- A
→ Gjerry: 或是 cbind(rbind(rbind(A, 0), 0), 0)
→ wgene: 謝謝!!