Map > Data
Mining > Explaining the Past
> Data Exploration > Univariate
Analysis > Categorical Variables 

Categorical
Variables

A categorical or discrete variable is one that has two or more
categories (values). There are two types of categorical variable, nominal
and ordinal. A nominal variable has no intrinsic ordering to
its categories. For example, gender is a categorical variable having two categories (male and female)
with no intrinsic ordering to the categories. An ordinal variable has a clear
ordering. For example, temperature as a variable with three orderly
categories (low, medium and high). A frequency table is a way of
counting how often each category of the variable in question occurs. It may be enhanced by the addition of percentages that fall into each category. 

Univariate Analysis 
Categorical 
Statistics 
Visualization 
Description 
Count 
Bar Chart 
The number of values of the specified
variable. 
Count% 
Pie Chart 
The percentage of values of the specified
variable. 


Example: The housing variable with three
categories (for free, own and rent). 


Exercise 
