I need get this:
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9]
[1,] 1 0 2 0 3 0 4 0 5
[2,] 0 0 0 0 0 0 0 0 0
[3,] 6 0 7 0 8 0 9 0 10
[4,] 0 0 0 0 0 0 0 0 0
[5,] 11 0 12 0 13 0 14 0 15
[6,] 0 0 0 0 0 0 0 0 0
[7,] 16 0 17 0 18 0 19 0 20
[8,] 0 0 0 0 0 0 0 0 0
[9,] 21 0 22 0 23 0 24 0 25
I write:
n<-5
x <- c(1,0,2,0,3,0,4,0,5,0,0,0,0,0,0,0,0,0,6,0,7,0,8,0,9,0,10,0,0,0,0,0,0,0,0,0,11,0,12,0,13,0,14,0,15,0,0,0,0,0,0,0,0,0,16,0,17,0,18,0,19,0,20,0,0,0,0,0,0,0,0,0,21,0,22,0,23,0,24,0,25)
x
M<-matrix(x,ncol=n+(n-1),byrow=TRUE)
length(x)
M
So, can I get this using n ? for example: x <- 1:n^2 ?? That is, I want to have seq(n^2) in a matrix, but I need rows with zeros and columns with zeros?
I hope my question is understandable, thank you very much :)