Recode a character variable

In this exercise, you'll recode() the nut variable in the desserts data. This is a character variable that tells us, for each bake, whether a nut was a key ingredient and if so, what kind of nut!

Remember that the arguments of recode() are the variable that you want to recode, and then an expression of the form old_value = new_value. recode() is most useful when used inside a mutate() to create a new variable or reassign the old one.

Often you want to recode a certain value as missing. In this case, it is important to preserve the data type of the variable. R has built-in words to indicate missing data of various types, for example NA_character_ for missing value for a character variable, or NA_integer_ for missing integer data. The NA value is of the logical type.

Remember that you can use ?function_name_here to read more about arguments and how to use them.

Count the distinct values in the nut variable, sorting the result based on the number of rows. How many bakes included filberts as the nut?

Exercise

Recode a character variable

Instructions 1/3