Complete Cases in R (Example)

The following R code shows how to apply the complete.cases() function in the R programming language.

Example Data Frame

my_data <- data.frame(x = c(3, 6, NA, 3, 2),         # Create example data
                      y = letters[1:5],
                      z = c(NA, 2, 1, 1, 2))
my_data                                              # Print example data
#  x   y   z
#  3   a  NA
#  6   b   2
# NA   c   1
#  3   d   1
#  2   e   2

Example 1: Basic Application of complete.cases Function in R

The complete.cases function returns a logical vector, indicating whether a row is complete (i.e. without NA values).

complete.cases(my_data)                              # Apply complete.cases function
# FALSE  TRUE FALSE  TRUE  TRUE

Example 2: Listwise Deletion in R

The complete.cases function can be used to perform listwise deletion:

data_complete <- my_data[complete.cases(my_data), ]  # Listwise deletion in R
data_complete                                        # Print reduced data
# x y z
# 6 b 2
# 3 d 1
# 2 e 2

Example Video

The following video shows further examples for the application of complete.cases in R:

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