Matrix

WIP

1. Matrix
   1. Create
   2. Get
   3. Test
   4. Convert

Create

What	How	Details
From vector to column matrix	matrix(x)
From vector to column matrix	cbind(x)

Get

What	How	Details
Elements by (row,col) pairs	mat[matrix(c(2,3), c(4,5)), ncol=2)]

Test

What	How	Details
Check if each column contains at most 1 unique value (i.e. all equal)	apply(x, 2, uniqueN) == 1
Check if all rows are equal	all(mat[1,] == t(mat))

Convert

What	How	Details
To list of row vectors	split(mat, row(mat))
To list of column vectors	split(mat, col(mat))
To list of submatrices grouped by row	lapply(split(mat, rowFactor), matrix, ncol = ncol(mat))