Mod 6 matrices pt. 2
Daniel Tafmizi
Dr. Friedman
Lis 4370
Module 6
Github: daniel.R/Work.R/LIS4370Rprog/math2.R at main · DanielDataGit/daniel.R (github.com)
> # 1)
>
> A = matrix(c(2,0,1,3), ncol = 2 )
>
> B = matrix(c(5,2,4,-1), ncol = 2 )
>
> A + B
[,1] [,2]
[1,] 7 5
[2,] 2 2
>
> A - B
[,1] [,2]
[1,] -3 -3
[2,] -2 4
>
> # 2)
>
> diag(c(4,1,2,3))
[,1] [,2] [,3] [,4]
[1,] 4 0 0 0
[2,] 0 1 0 0
[3,] 0 0 2 0
[4,] 0 0 0 3
>
> # 3)
>
> x = diag(3,5)
>
> x[1, 2:5] = 1
>
> x[2:5, 1] = 2
>
> x
[,1] [,2] [,3] [,4] [,5]
[1,] 3 1 1 1 1
[2,] 2 3 0 0 0
[3,] 2 0 3 0 0
[4,] 2 0 0 3 0
[5,] 2 0 0 0 3
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