# How do I turn a variable into a factor in R?

## How do I turn a variable into a factor in R?

In R, you can convert multiple numeric variables to factor using lapply function. The lapply function is a part of apply family of functions. They perform multiple iterations (loops) in R. In R, categorical variables need to be set as factor variables.

## Why do you factor variables in R?

Factor variables are also very useful in many different types of graphics. Furthermore, storing string variables as factor variables is a more efficient use of memory. To create a factor variable we use the factor function. The only required argument is a vector of values which can be either string or numeric.

What does factor () do in R?

Factors are the data objects which are used to categorize the data and store it as levels. They can store both strings and integers. They are useful in the columns which have a limited number of unique values.

What is a factor variable example?

What factor variables are. A “factor” is a vector whose elements can take on one of a specific set of values. For example, “Sex” will usually take on only the values “M” or “F,” whereas “Name” will generally have lots of possibilities. The set of values that the elements of a factor can take are called its levels.

### What is categorical variable in R?

Plot Categorical Data in R, Categorical variables are data types that can be separated into categories. Race, sex, age group, and educational level are examples of categorical variables.

### How do I change factor labels in R?

How do I Rename Factor Levels in R? The simplest way to rename multiple factor levels is to use the levels() function. For example, to recode the factor levels “A”, “B”, and “C” you can use the following code: levels(your_df\$Category1) <- c(“Factor 1”, “Factor 2”, “Factor 3”) .

What is factor in R example?

Factor is a data structure used for fields that takes only predefined, finite number of values (categorical data). For example: a data field such as marital status may contain only values from single, married, separated, divorced, or widowed.

How many variables are recognized as categorical variables by R?

two different types
There are two different types of categorical variables: A nominal categorical variable, which is a categorical variable without an implied order.

#### Can you label variables in R?

Variable label is human readable description of the variable. R supports rather long variable names and these names can contain even spaces and punctuation but short variables names make coding easier. Variable label can give a nice, long description of variable.

#### How do I view variable labels in R?

To get the variable label, simply call var_label() . To remove a variable label, use NULL . In RStudio, variable labels will be displayed in data viewer.