Arrays & Matrices in R

Arrays and matrices are used to store data in multiple dimensions.

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Arrays

• Created using array() function.
• Can hold data in 2D, 3D, or higher dimensions.

Example

arr <- array(1:12, dim = c(3, 2, 2))
print(arr)


##Matrices
m <- matrix(1:6, nrow=2)
print(m)

# Transpose
t(m)

# Matrix multiplication
m %*% t(m)