How to get Number of Columns in Matrix in R

How to get Number of Columns in Matrix in R ?

To get the number of columns in a matrix in R, you can use the ncol() function, which returns the number of columns present in the given matrix.

In this example,

First, we create a 3x3 matrix named matrix1 using the matrix() function and specify the elements and dimensions. The matrix() function takes a vector of values and arranges them into the specified number of rows and columns.
We then use the ncol() function to get the number of columns in matrix1. The ncol() function takes the matrix as an argument and returns the number of columns.
The result, which is the number of columns, is stored in the variable numCols.
Finally, we print the value of numCols using the print() function to display the number of columns in the matrix.

matrix1 <- matrix(1:9, nrow = 3, ncol = 3)
numCols <- ncol(matrix1)
print(paste("Number of columns in matrix1 is:", numCols))

Number of columns in matrix1 is: 3

In this example,

First, we create a 4x2 matrix named matrix2 using the matrix() function and specify the elements and dimensions. The matrix() function takes a vector of values and arranges them into the specified number of rows and columns.
We then use the ncol() function to get the number of columns in matrix2. The ncol() function takes the matrix as an argument and returns the number of columns.
The result, which is the number of columns, is stored in the variable numCols.
Finally, we print the value of numCols using the print() function to display the number of columns in the matrix.

matrix2 <- matrix(1:8, nrow = 4, ncol = 2)
numCols <- ncol(matrix2)
print(paste("Number of columns in matrix2 is:", numCols))

Number of columns in matrix2 is: 2

In this example,

First, we create a 5x5 matrix named matrix3 using the matrix() function and specify the elements and dimensions. The matrix() function takes a vector of values and arranges them into the specified number of rows and columns.
We then use the ncol() function to get the number of columns in matrix3. The ncol() function takes the matrix as an argument and returns the number of columns.
The result, which is the number of columns, is stored in the variable numCols.
Finally, we print the value of numCols using the print() function to display the number of columns in the matrix.

matrix3 <- matrix(1:25, nrow = 5, ncol = 5)
numCols <- ncol(matrix3)
print(paste("Number of columns in matrix3 is:", numCols))

Number of columns in matrix3 is: 5

In this tutorial, we learned How to get Number of Columns in Matrix in R language with well detailed examples.