## 1. Bar Chart and Histogram in R – Objective

In this blog, we will discuss the Bar chart in R and Histogram in R Programming. Also, discuss the difference between histogram and bar chart in R, Introduction to Data Visualization in R, DataSet in R, Central Tendency Measures, and last we see types of Bar Charts in **R Programming Language**.

So, let’s start Bar Chart and Histogram in R.

Bar Chart in R | Histogram in R | Learn with Examples

## 2. What is Data Visualization in R?

- Generally,
**R** has the ability to create data visualizations with a couple of lines of code. Also, it is an art of how to turn numbers into useful knowledge.

- Basically, data visualization is the process of presenting data through pictures and shapes. Also, can be considered as a modern equivalent of visual communication. The goal is to communicate information to users.

- It is said that one meaningful picture is powerful than a thousand words.

**Data visualization can help us in the following ways:**

a. Identify areas that need attention or improvement.

b. Clarify which factors influence customer behavior.

c. Help you understand the right placement of the products.

## 3. Data Set in R

Basically, it is defined as the field in following data. Thus, it provides a number of sample data sets. As there are present thousands of data sets. That we can use to practice and get better at machine learning.

Although, in U.C.I

**Machine Learning** Repository, most of data sets are hosted for free. These data sets are so useful. As they are small, well behaved and well understood.

- It can download easily and fast.
- One can fit them into memory easily.
- You can run algorithms on them quickly.

## 4. Central Tendency Measures

It is a value which can best describe an entire set of observations. It can be measured by:

**Mean** – add up the values in the dataset and then divide by the number of values that you added.

**Median** – list the values of the data set in numerical order and identify which value appears in the middle of the list.

**Mode** – identify which value in the data set occurs most often.

A histogram in R is the best choice for visualizing central tendency of data.

### a. Histogram in R

Basically, histograms in R are a special form of bar chart. Also, we use histograms to represents always continuous rather than discrete categories.

Generally, the bar chart in R, the length of the bar indicates the size of the category. But in a histogram, it is the area of the bar that is proportional to the size of the category.

**Difference between histogram and bar chart in R:**

The histogram in R, both the x-axis and y-axis have a scale while in a bar chart in R, only the y-axis has a scale.

### b. Bar Chart in R

Basically, we use the bar chart in R to display and compare the density, frequency. Also, there are several variations of the standard bar chart including:

Bar Chart in R

Also, they are useful for displaying data. That data is classified into nominal or ordinal categories

#### i. Vertical and Horizontal Bar Chart in R

Horizontal represents longer the bar, the larger the category. While Vertical represents that the taller the bar, the larger the category. This is a particularly effective way of presenting data when the different categories have long titles.

**Example**

Vertical and Horizontal Bar Chart

#### ii. Grouped Bar Chart in R

These are used to show the information about different sub-groups of the main categories. A separate bar represents each of the sub-groups (e.g. civic amenity sites) and these are usually colored or shaded differently to distinguish between them.

**R Bar Chart Example**

Grouped Bar Chart

#### iii. Stacked Bar Chart in R

They are similar to group bar charts. As we use these charts to display information about the sub-groups that make up the different categories.

**R Bar Chart Example**

Stacked Bar Chart

So, this was all in Bar Chart in R. Hope you like our explanation of Histogram in R.

## 5. Conclusion

Hence, we have studied Data Visualization in R. Also, dataset and central tendency measures. Moreover, we looked at the difference between histogram and bar chart in R, Bar Chart in R, Vertical and Horizontal Chart in R, Grouped Bar Chart in R, Stacked Bar Chart in R. As this will help you in future to understand its real-life concepts. Furthermore, if you have any queries regarding Bar chart or Histogram in R, feel free to ask in the comment section.