Transpose a vector into single column in R

Array Transposition in R

Last Updated : 14 Sep, 2021

In this article, we will discuss how can we transpose an array in the R programming language. The transpose of an array is obtained by changing rows to columns and columns to rows.

Aij = Aji

where i is not equal to j, thus diagonals remain unchanged.

Example:

Array demo[] --->  [1, 4, 7
                    2, 5, 8,
                    3, 6, 9] 
Transpose of demo[]:
Output --->   [1, 2, 3
               4, 5, 6
               7, 8, 9]

There are two methods to get transpose of an array in R:

Method 1: Naive approach

We can iterate over the array and assign the correspondent elements from row to column and column to row.

Example: Transpose of an array

R

# Create the array Demo 
Demo <- matrix(1:9, nrow = 3) 
print(Demo) 
    
# create another array Output 
Output <- Demo 
    
# Loops for array Transpose 
for (i in 1:nrow(Output)) 
{    
    for (j in 1:ncol(Output)) 
    {  
         Output[i, j] <- Demo[j, i]  
    } 
} 
    
# print the transposed array output 
print(Output)

Output:

Method 2: Using t() function

We can transpose an array directly in R using the inbuilt function t(). This function takes the array as a parameter and returns its transpose.

Syntax:

t(array)

Example: Transpose of an array

R

# Create demo array 
Demo <- matrix(1:9, nrow = 3)  
print(Demo) 
  
# using t() function transpose Demo 
Output <- t(Demo)  
print(Output)

Output:

Transpose a vector into single column in R

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