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R Data Visualization Cookbook by Atmajitsinh Gohil

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Special values in R

R comes with some special values. Some of the special values in R are NA, Inf, -Inf, and NaN.

Special values in R

How to do it…

The missing values are represented in R by NA. When we download data, it may have missing data and this is represented in R by NA:

z = c( 1,2,3, NA,5,NA) # NA in R is missing Data

To detect missing values, we can use the install.packages() function or is.na(), as shown:

complete.cases(z) # function to detect NA
is.na(z) # function to detect NA

To remove the NA values from our data, we can type the following in our active R session console window:

clean <- complete.cases(z)
z[clean] # used to remove NA from data

Please note the ...

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