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Data Structure - Matrix
What is a Matrix?
✍: FYIcenter.com
Matrix is an extension of vector into 2 dimensions
1. Create a matrix object with the matrix() function -
> m = matrix(1:20, nrow=5,ncol=4) > m [,1] [,2] [,3] [,4] [1,] 1 6 11 16 [2,] 2 7 12 17 [3,] 3 8 13 18 [4,] 4 9 14 19 [5,] 5 10 15 20 > typeof(m) [1] "integer" > is.matrix(m) [1] TRUE > is.vector(m) [1] FALSE
2. Get matrix length, dimensions and members -
> m = matrix(1:20, nrow=5,ncol=4) > length(m) [1] 20 > dim(m) [1] 5 4 > m[3,2] [1] 8
2023-05-31, 285🔥, 0💬
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