How to create a matrix in R?
This recipe helps you create a matrix in R
Recipe Objective
How to create a matrix in R ? A matrix is a two-dimensional data structure, i.e., a matrix contains rows and columns. Matrices are used for performing mathematical calculations. A matrix function takes the following input values: matrix (data, nrow, ncol, byrow, dimnames). Data — is our input matrix value, nrow and ncol — are the number of rows and columns required, if byrow=TRUE , the input numbers are arranged by rows and if byrow=FALSE, then they are arranged by columns. dimnames — assigns names to rows and columns of a data frame. This recipe demonstrates how we can create a matrix of any dimension in R.
Step 1 - Create a matrix
Creating a matrix using the matrix() function. with byrow=TRUE condition.
m <- matrix(c(1:10), nrow = 4, ncol = 5, byrow = TRUE)
print(m)
#The output is a 4*5 matrix where the numbers are arranged by rows.
"Output of the code " :
[,1] [,2] [,3] [,4] [,5]
[1,] 1 2 3 4 5
[2,] 6 7 8 9 10
[3,] 1 2 3 4 5
[4,] 6 7 8 9 10
Step 2 - Create a matrix
Creating a matrix using the matrix() function. with byrow=FASLE condition.
m <- matrix(c(1:10), nrow = 4, ncol = 5, byrow = FALSE)
print(m)
#The output is a 4*5 matrix where the numbers are arranged by columns.
"Output of the code " : [,1] [,2] [,3] [,4] [,5] [1,] 1 5 9 3 7 [2,] 2 6 10 4 8 [3,] 3 7 1 5 9 [4,] 4 8 2 6 10
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