Question

I have a Stata command which generates the new variable y with value .

gen y=. 

I want to know whether following is the equivalent command in R“

y<-NA

Answer 1

Using this

In Stata the basic missing value for numeric variables is represented by a dot .

In R the missing values are represented by NA.

Starting with version 8 there are 26 additional missing-value codes
denoted by .a to .z. These values are represented internally as very
large numbers, so valid_numbers< . < .a < … < .z.

R haven’t such representation of missing data. all missings data are represneted by NA.

In Stata To check for missing you need to write var >= .

In R, we use is.na to check for missing data.