10. Missing Data in R

In R, missing values are represented by the symbol NA (not available)
Impossible values (for example, dividing by 0) are represented by the symbol NaN (not a number)
The is.na() function allows you to test for the presence of missing values:
- It returns an object of the same size, with the entries replaced by TRUE if the element is missing value, and FALSE if the element is not a missing value

Google Sites

Report abuse