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# How to remove rows and columns of a matrix in R Onyejiaku Theophilus Chidalu

### Overview

To understand what a matrix is and how to create a matrix in R, read this shot.

### Removing rows and columns from an existing matrix

To remove the row(s) and column(s) of a current matrix in R, we use the c() function.

### Parameters of the c() function

The numbers that represent the row number and column number we wish to remove are the parameters. For example:

[-c(1), -c(1)]


The code above specifies the first row and the first column.

### Code example

mymatrix <- matrix(c("apple", "banana", "cherry", "orange", "mango", "pineapple"), nrow = 3, ncol =2)

# removing the first row an first colummn of the matrix
mymatrix <- mymatrix[-c(1), -c(1)]

mymatrix
Using the c() function

### Code explanation

• Line 2: We create a 3x2 matrix (a matrix with 3 rows and 2 columns) called mymatrix. We use the matrix() function and pass the parameter values of its shape. nrow = 3 represents 3 rows, while ncol = 2 represents 2 columns.
• Line 4: Using the c() function, we remove the first row and first column [-c(1), -c(1)] from the matrix.
• Line 6: We print the modified matrix.

RELATED TAGS

matrix
removing rows
removing columns
r
communitycreator

CONTRIBUTOR Onyejiaku Theophilus Chidalu
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