Creating a Matrix in R from existing rows of other matrices

Question

I have two matrices which I created with the code A<- matrix(9:1, nrow=3) and B<- matrix ( diag 1:3, nrow=3) .

Now, I would like to creat a new matrix, C, by extracting first two rows of A and third row of B. What code do I use?

Answer 1

My R is a bit rusty, and I cannot test this on Sololearn. So please let me know if this doesn't work.

A <- matrix(9:1, nrow=3)
B <- diag(1:3, nrow=3)
C <- rbind(A[1:2,], B[3,])

Thanks!

Answer 2

Kishalaya, it worked.

Thanks very much

Answer 3

Awesome! Cheers! 😊👍