How to Create an Empty Matrix in R

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Here are three ways to create an empty matrix in R:

  1. Using row and column
  2. Using only row
  3. Using only column

Method 1: Using a row and column

Method 1 - Using a row and column to create an empty matrix

mat <- matrix(, nrow = 3, ncol = 2)

print(mat)

Output

     [,1]  [,2]
[1,]  NA    NA
[2,]  NA    NA
[3,]  NA    NA

We created a 3×2 matrix mat with three rows and two columns, initially filled with NA values because there is no data and it is empty.

Method 2: Using only a row

Method 2 - Using only a row to create an empty matrix

mat <- matrix(, nrow = 5, ncol = 0)

print(mat)

Output

[1,]
[2,]
[3,]
[4,]
[5,]

We created a matrix mat with 5 rows and 0 columns.

Method 3: Use the column

Method 3 - Use the column to create an empty matrix

mtrx <- matrix(ncol = 4, nrow = 0)

mtrx

Output

 [,1] [,2] [,3] [,4]

That is it.

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