Physicians routinely recommend a high-fiber diet that is full of roughage, or insoluble fiber, in order to keep things moving along. While this can be helpful, in some cases a high-fiber diet may actually promote intestinal infection. High-fiber diets are also high-residue diets.
The MATRIX program is designed to perform and to teach row operation algorithms on matrices. The program can work in a decimal floating-point mode in which calculations are carried out to 18 significant digits, or it can work in a fraction mode with exact rational arithmetic.
Matrix. A matrix is a collection of data elements arranged in a two-dimensional rectangular layout. The following is an example of a matrix with 2 rows and 3 columns. We reproduce a memory representation of the matrix in R with the matrix function. The data elements must be of the same basic type. + c(2, 4, 3, 1, 5, 7), # the data elements. + nrow=2, # number of rows. + ncol=3, # number of columns. + byrow = TRUE) # fill matrix by rows. [,1] [,2] [,3]. [1,] 2 4 3. [2,] 1 5 7. An element at the m row, n column of A can be accessed by the expression A[m, n] .