insert custom row and column into existing matrix in r

To insert a custom row and column into an existing matrix in R, you can follow these steps:

1. First, create a new row and column that you want to insert.
2. Use the rbind() function to append the new row to the matrix.
3. Use the cbind() function to concatenate the new column to the matrix.

Here is an example code snippet to illustrate the process:

# Sample matrix
existing_matrix <- matrix(1:9, nrow = 3, byrow = TRUE)

# New row to insert
new_row <- c(10, 11, 12)

# Insert the new row
updated_matrix <- rbind(existing_matrix, new_row)

# New column to insert
new_column <- c(13, 14, 15)

# Insert the new column
updated_matrix <- cbind(updated_matrix, new_column)

# Display the updated matrix
print(updated_matrix)
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In this example, a new row [10, 11, 12] and a new column [13, 14, 15] are inserted into the existing 3x3 matrix.