How to Calculate Row and Column Sums in R - Step by Step Examples

How to Calculate Row and Column Sums in R ?

In R, you can calculate row and column sums of matrices using the rowSums() and colSums() functions, respectively.

In this example,

We have a matrix named mat.
We apply the rowSums() function to calculate the sum of elements in each row of the matrix mat.
We assign the resulting row sums to a variable named row_sums.
We print the row_sums to the console to display the row sums of the matrix.

mat <- matrix(c(1, 2, 3, 4, 5, 6), nrow = 2)
row_sums <- rowSums(mat)
print(row_sums)

[1]  6 15

In this example,

We have a matrix named mat.
We apply the colSums() function to calculate the sum of elements in each column of the matrix mat.
We assign the resulting column sums to a variable named col_sums.
We print the col_sums to the console to display the column sums of the matrix.

mat <- matrix(c(1, 2, 3, 4, 5, 6), nrow = 2)
col_sums <- colSums(mat)
print(col_sums)

[1] 5 7 9

In this tutorial, we learned How to Calculate Row and Column Sums in R language with well detailed examples.