# What Is Categorical Data and How To Identify Them

### In data science, categorical data can be considered the most usable data type. In this article, we’ll explore categorical data, types, and how to identify them.

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Join For FreeData, in numerical and logical talk, is a collection of information gathered. This data could be anything and can be utilized to demonstrate or discredit speculation (or logical supposition) during an analysis. Information that can be gathered can be tallness, weight, an individual's assessment on a policy-centered issue, the number of individuals that come down with a specific bug longer than a year thus significantly more. Information is normally assembled into two unique kinds of data: downright and mathematical. In this article, we'll talk about categorical data, types of categorical data, features, and characteristics of categorical data, etc. So, let’s get started.

## What Is Categorical Data

Categorical data is a sort of data that can be put away into categories or classifications with the guide of names or labels. This gathering is typically made by the data attributes and resemblance of these qualities and characteristics through a strategy known as matching.

Categorical data, as the name infers, is assembled into a type of class or various classifications. For instance, if I somehow happened to gather data about an individual's pet inclinations, I would need to collect and group that data by the kind of pet. Categorical data is additional information that is gathered in an either/or yes/no design. For instance, if I somehow happened to ask individuals in my office to check 'yes' or 'no' on whether they had youngsters, at that point, I can show that data in a structured graph or a pie chart looking at colleagues that had kids versus collaborators that don't have kids.

Categorical data can take on mathematical values, (for example, "1" showing Yes and "2" demonstrating No), yet those numbers don't have numerical importance. One can neither add them together nor deduct them from one another.

Categorical data is also called qualitative data, every component of a categorical dataset can be put in just a single class as indicated by its characteristics, where each of the classifications is totally unrelated.

## Types of Categorical Data

We have learned what categorical data is, now in this part of the article, we’ll see the types of categorical data.

There are mainly two types of categorical data, called Nominal Data and Ordinal Data.

**Nominal Data**

Nominal data is a kind of data that is utilized to name factors without offering any quantitative benefit. It is the most straightforward type of size measure. Nominal data can't be requested and can't be estimated. Nominal data can be qualitative and quantitative. Be that as it may, the quantitative marks do not have a mathematical worth or relationship (e.g., identification number). Then again, different sorts of qualitative information can be addressed in nominal form. They may incorporate words, letters, and images. Names of person, sex, and identity are some of the most well-known examples of nominal data. Nominal data can be analyzed utilizing the grouping technique. The factors can be assembled into classes, and for every classification, the recurrence or rate can be determined. The information can also be introduced visually, for example, by using a pie chart.

**Ordinal Data**

Ordinal data is one type of categorical data which is the sort of data wherein the qualities follow a characteristic request. Perhaps the most prominent highlights of ordinal data are that the contrasts between the information esteem can't be resolved or are futile. For the most part, the data classes do not have the width addressing the equivalent augmentations of the basic attributes.

Ordinal data can't be controlled or manipulated utilizing numerical operators. Because of this, the only accessible proportion of focal inclination for datasets that contain ordinal data is the median. The Likert scale is one of the examples of ordinal data.

## How Do You Identify the Categorical Data

Till now we have learned what is categorical data, types of categorical data, nominal data, ordinal data, and their definition. Now the question is how do you identify the categorical data? In this section, we’ll discuss how to identify and calculate the categorical data.

To identify the categorical data in a data set we can follow the steps:

- Find out the unique value in the data set.
- Find out the difference between the total number of values and the number of unique values in the data set.
- Compute the percentage of the total numbers of values in the data collection.
- In the data set, if the rate of difference is 90% or more, the data set is made out of categorical data.

## Categorical Data vs Numerical Data

Categorical data and Numerical Data are the two most regular kinds of data you will experience in data science and the most well-known method of characterizing or gathering the different sorts of data. You'll experience them frequently in data science, so it's important that you obviously understand the differentiation between the two.

- Categorical data is a kind of data that is utilized to gather data with comparative qualities while Numerical Data is a sort of data that communicates data as numbers. It consolidates numeric qualities to portray applicable data while downright information utilizes a distinct way to deal with express data.
- Categorical data is additionally called qualitative data while numerical data is likewise called quantitative data. This is on the grounds that categorical data is utilized to qualify data prior to ordering them as per their similarities.

During the data collection, the expert may gather both numerical data and categorical data when analyzing to investigate alternate points of view. Be that as it may, one is necessary to understand the difference between these two data types to appropriately utilize them in research.

**Wrapping Up**

In this article, we have learned about categorical data which is the most useful data type in Data Science. Also discussed are types of categorical data, how to identify categorical data, and categorical data vs numerical data.

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