Question

Which of the following statements is NOT true about matrices in R?

a. We use the matrix command to create a matrix in R
b. When we reference things in a matrix, we need parentheses
c. When we create a matrix, we must specify its dimensions
d. When we create a matrix, we use brackets

Answer 1

The false statement about matrices in R is that you use brackets to create a matrix. Instead, you use the 'matrix' command with parentheses for data and dimensions.

Step-by-step explanation:

The statement that is NOT true about matrices in R is: When we create a matrix, we use brackets. In R, the correct syntax for creating a matrix involves using the matrix command, and dimensions must be specified, but the matrix elements are enclosed in parentheses, not brackets.

To create a matrix in R, you would usually perform a command similar to the following:

matrix(data = c(1, 2, 3, 4), nrow = 2, ncol = 2)

In this example, the c(1, 2, 3, 4) represents the data being used to fill the matrix, and nrow = 2, ncol = 2 specifies its dimensions as 2 rows and 2 columns. Note that the data elements are not enclosed in brackets but in parentheses.

Furthermore, when referencing elements within a matrix, you would indeed use square brackets, for example, matrix[1, 2] would reference the element in the first row and second column of the matrix.