is.na Function in R (3 Examples)

x <- c(4, 1, NA, 7, 2, NA, 5)   # Create example vector

x <- c(4, 1, NA, 7, 2, NA, 5) # Create example vector

is.na(x)                        # Return logical vector
# FALSE FALSE  TRUE FALSE FALSE  TRUE FALSE

is.na(x) # Return logical vector # FALSE FALSE TRUE FALSE FALSE TRUE FALSE

x[!is.na(x)]                    # Remove NA values
# 4 1 7 2 5

x[!is.na(x)] # Remove NA values # 4 1 7 2 5

x[is.na(x)] <- 0                # Replace NA with 0
x
# 4 1 0 7 2 0 5

x[is.na(x)] <- 0 # Replace NA with 0 x # 4 1 0 7 2 0 5