The Purpose The point of a visualization is to communicate its data in a quick and meaningful way while remaining 100 percent accurate. A visualization should serve a clear purpose and not overwhelm the users with unnecessary details. If possible, a visualization should be designed to encourage the users to compare its various elements so […]

# Data Visualization with R

## When to Use Bar Chart, Column Chart, and Area Chart

Bar Chart and Column Chart A Bar Chart or Bar Graph can be only used to compare values. It presents grouped data using rectangular bars whose lengths are proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a Column Chart. Bar charts […]

## What is Line Chart and When to Use It

A Line Chart or Line Graph is the most popular type of the data visualization. It displays information as a series of data points called ‘markers’ connected by straight line segments. Usually, a Line Chart shows a dynamics of the displayed value in time (in case of Cartesian Chart) or by X (in case of […]

## What are Pie Chart and Donut Chart and When to Use Them

Pie Chart The Pie Chart is essentially a circle divided into sectors. The area of each item reflects its value’s proportion of the sum of all values in one data set. Pie Chart are useful when you need to display the share of each constituent part as compared to the whole volume. Sectors can be […]

## How to Read Scatter Chart and Bubble Chart

Scatter charts show the relationships among the numeric values in several data series, or between two groups of numbers as one series of XY coordinates. A scatter chart has two value axes, showing one set of numerical data along the horizontal axis (X-axis) and another one along the vertical axis (Y axis). It combines these […]

## What is a Box Plot and How to Read It

A Box Plot is a convenient way of graphically depicting groups of numerical data through their quartiles. They provide a graphical rendition of statistical data based on the minimum, first quartile, median, third quartile, and maximum, also Outliers can be plotted as individual points. The term “box plot” comes from the fact that the graph […]

## Understanding Japanese Candlestick Charts and OHLC Charts

Japanese Candlestick Chart Japanese Candlestick is a type of financial charts, the modification of OHLC Chart. Candlesticks are usually composed of the body (black or white), and an upper and a lower shadow (wick): the area between the open and the close is called the real body, price excursions above and below the real body […]

## Understanding Treemap, Heatmap and Other Map Charts

Treemap Treemaps display hierarchical data by using nested rectangles, that is, smaller rectangles within a larger rectangle. The Treemap Chart is intended for the visualization of hierarchical data in the form of nested rectangles. Each level of such a tree structure is depicted as a colored rectangle, often called a branch, which contains other rectangles […]

## Visualization in Data Science

The advent of data science has opened doors to making discoveries from data in new and innovative ways. By combining statistics, computer science, applied mathematics and data visualizations, a data scientist or analyst can turn vast amounts of complex data into meaningful insights and new knowledge. The fundamental purpose of any data science project is […]

## Graphic Systems in R

If you want to plot a graph in R for your own consumption, it is pretty easy and you can generally do it with a few lines of code. However, if you are creating the graph for others consumption and want full control over all aspects of the graph, it will require some effort. The […]