Array Transposition in R
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:
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