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How to add a column to a matrix in R

Onyejiaku Theophilus Chidalu

Overview

To understand and create a matrix in R, read this shot.

Adding a column to a matrix

The cbind() function adds additional columns to a matrix in R.

Syntax

cbind(matrix, c(column elements))

Parameter value

The cbind() function takes two parameter values:

  1. matrix: This is the existing matrix to which we will add a column.
  2. column elements: This is the list of elements we wish to add to the new column.

Return value

The cbind() function returns a modified matrix with a new column.

Code

# creating a matrix
myMatrix <- matrix(c("apple", "banana", "cherry", "orange","grape", "pineapple", "pear", "melon", "fig"), nrow = 3, ncol = 3)

# adding a colum using the cbind() function
myNewMatrix <- cbind(myMatrix, c("lemon", "mango", "strawberry"))

# printing the new matrid
myNewMatrix
Adding a column to a matrix using the cbind() function

Code explanation

  • Line 2: We create a 3 by 3 matrix (a matrix with 3 rows and 3 columns) myMatrix using the matrix() function. We then passing the parameter values of its shape. nrow = 3 represents 3 rows, and ncol = 3 represents 3 columns.
  • Line 5: We use the cbind() function to add a new column of elements to the existing matrix.
  • Line 7: We print myNewMatrix.

It is worth noting that the new column must be the same length as the current matrix.

RELATED TAGS

matrix
r
cbind()
column
communitycreator

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Onyejiaku Theophilus Chidalu
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