How to get Column Names in a Matrix in R - Step by Step Examples

How to get Column Names in a Matrix in R ?

To get the column names of a matrix in R, you can use the colnames() function. This function retrieves the column names as a vector.

In this example,

First, we create a 2x2 matrix named matrix1 using the matrix() function with a vector of values c(1, 2, 3, 4) and specify the number of rows as 2.
We assign column names c('Col1', 'Col2') to the matrix using the colnames() function.
To get the column names, we use the colnames() function on matrix1 and store the result in a variable called colNames1.
Finally, we use the print() function to display the column names stored in colNames1.

matrix1 <- matrix(c(1, 2, 3, 4), nrow = 2)
colnames(matrix1) <- c('Col1', 'Col2')
colNames1 <- colnames(matrix1)
print(colNames1)

[1] "Col1" "Col2"

In this example,

We first create a 3x3 matrix named matrix2 using the matrix() function with a vector of values c(1, 2, 3, 4, 5, 6, 7, 8, 9) and specify the number of rows as 3.
We assign column names c('X', 'Y', 'Z') to the matrix using the colnames() function.
To get the column names, we use the colnames() function on matrix2 and store the result in a variable called colNames2.
Finally, we use the print() function to display the column names stored in colNames2.

matrix2 <- matrix(c(1, 2, 3, 4, 5, 6, 7, 8, 9), nrow = 3)
colnames(matrix2) <- c('X', 'Y', 'Z')
colNames2 <- colnames(matrix2)
print(colNames2)

[1] "X" "Y" "Z"

In this example,

First, we create a 4x2 matrix named matrix3 using the matrix() function with a vector of values c(10, 20, 30, 40, 50, 60, 70, 80) and specify the number of rows as 4.
We assign column names c('C1', 'C2') to the matrix using the colnames() function.
To get the column names, we use the colnames() function on matrix3 and store the result in a variable called colNames3.
Finally, we use the print() function to display the column names stored in colNames3.

matrix3 <- matrix(c(10, 20, 30, 40, 50, 60, 70, 80), nrow = 4)
colnames(matrix3) <- c('C1', 'C2')
colNames3 <- colnames(matrix3)
print(colNames3)

[1] "C1" "C2"

In this tutorial, we learned How to get Column Names in a Matrix in R language with well detailed examples.