What is is.na() function in R?

The is.na() function in R#

is.na() is used to deal with missing values in the dataset or data frame. We can use this method to check the NA field in a data frame and help to fill them. To deal with missing values, one's can fill empty fields by NA's using fill.NAs().

Note: We can also use which() function to extract exact indexes of NA values.

Syntax#

Parameters#

It takes the following value as an agument:x: It can either be a vector or a data frame.

Return valueIt returns the boolean or logical value either TRUE or FALSE.

Code#

Let’s discuss is.na() function with code examples:

We can also use is.na() to find the missing values in a dataframe and then replace them with new value.

Find missing values.

Replace missing values with other values.

Count the number of missing values.