## Why is picking the right programming language for Blockchain so important?

Picking the right programming language for Blockchain can have a huge impact on a Blockchain platform’s future success. Security is obviously the main concern — not least because a vulnerability can have a...

## What is crypto custody?

For the uninitiated, these services pave the way for digital assets to be securely held in large volumes. Some advocates believe that this could be one of the key factors needed to trigger an influx of new...

## Data Science Glossary: What is Data Journalism

The Data Journalism discipline is all about telling interesting and important stories with a data focused approach. Data Journalism has come about naturally with more information becoming available as data. A...

# Category - Data Visualization

Data visualization is the graphic representation of data. It involves producing images that communicate relationships among the represented data to viewers of the images.

## What is a Stacked Bar Graph?

Unlike a Multi-set Bar Graph which displays their bars side-by-side, Stacked Bar Graphs segment their bars. Stacked Bar Graphs are used to show how a larger category is divided into smaller categories and what...

## What is Stacked Area Graph in Data Visualization

Stacked Area Graphs work in the same way as simple Area Graphs do, except for the use of multiple data series that start each point from the point left by the previous data series. The entire graph represents the total...

## What is Spiral Plot in Data Visualization?

Spiral Plots are ideal for showing large data sets, usually to show trends over a large time period. This makes Spiral Plots great for displaying periodic patterns. This type of visualisation plots time-based data along...

## What is a Scatterplot in Data Visualization

Scatterplots use a collection of points placed using Cartesian Coordinates to display values from two variables. By displaying a variable in each axis, you can detect if a relationship or correlation between the two...

## What is Sankey Diagram in Data Visualization

Sankey Diagrams display flows and their quantities in proportion to one another. The width of the arrows or lines are used to show their magnitudes, so the bigger the arrow, the larger the quantity of flow. Flow arrows...

## What is Radial Bar Chart ?

A Radial/Circular Bar Chart is simply a Bar Chart plotted on a polar coordinate system, rather than on a Cartesian one. While they look cool, the problem with Radial Bar Charts is that the bar lengths can be...

## What is Radar Chart in Data Visualization

Radar Charts are a way of comparing multiple quantitative variables. This makes them useful for seeing which variables have similar values or if there are any outliers amongst each variable. Radar Charts are also useful...

## What is a Proportional Area Chart?

Proportional Area Charts usually use squares or circles. However, any shape can be used, so long as you use the shape’s area to represent the data. A common technical error with area charts is to use one length to...

## What is a Population Pyramid in Data Visualization?

A Population Pyramid is a pair of back-to-back Histograms (for each sex) that displays the distribution of a population in all age groups and in both sexes. The X-axis is used to plot population numbers and the Y-axis...

## Point & Figure Chart Explained

Point & Figure chart is used to display the relationship between supply and demand of a particular asset through a series of columns made up of X’s and O’s. Point & Figure Charts are time-independent...

## What is a Pie Chart in Data Visualization?

Extensively used in presentations and offices, Pie Charts help show proportions and percentages between categories, by dividing a circle into proportional segments. Each arc length represents a proportion of each...

## What Is a Data Warehouse?

Data warehousing is one of the hottest topics both in business and in data science. But if you’re new to the field, you’re probably wondering what a data warehouse is, why we need it, and how it works. Don’t worry...

Hi, I am Ned Krastev – co-founder of 365 Data Science, and I am happy to announce the latest release in the 365 Data Science Program – the Introduction to Business Analytics course. In this post...

## How to Become a Data Analyst Intern?

Starting off as a data analyst intern is one of the best ways to begin a career in the field of analytics and data science if you don’t have any prior working experience. The benefits of a data...

## Product Management for AI & Data Science

We’ve been developing this project for a while, and finally, the time has come to launch our newest collaboration with an acknowledged expert in the field of AI and data science. We’re happy to announce the release of...

## What is a Pictogram Chart in Data Viz?

Pictogram Charts use icons to give a more engaging overall view of small sets of discrete data. Typically, the icons represent the data’s subject or category, for example, data on population would use icons of people...

## Interview with Vladimir Ninov, Head of Organic Growth at 365 Data Science

Vladimir Ninov is a marketing professional and Head of Organic Growth at 365 Data Science with rich experience in PR, growth hacking, and fintech. He holds a Master’s degree in Business Administration and...

## Skewness Example

An Example of Skewness The most commonly used tool to measure asymmetry is skewness. This is the formula to calculate it. Almost always, you will use software that performs the calculation for you, so in this...

## Python tuples Explained in 2020

Python tuples are another type of data sequences, but differently to lists, they are immutable. Tuples cannot be changed or modified; you cannot append or delete elements. The syntax that indicates you are having a...

## Else if, for Brief – ELIF

In this lesson, we’ll learn an elegant way of adding a second “if” statement to one of our expressions. This is done with the help of the elif keyword, as shown in this example. If y is not greater than 5, the...

## Basic Database Terminology

Learning more about basic database terminology is a necessary step that will help us when we start coding. Let’s go through the entire process of creating a database. Assume our database containing customer sales...

## Database vs Spreadsheet in 2020

I would imagine some of you are Excel users and still think of an Excel or Google spreadsheet when we talk about tabular data. Please, don’t do that! Data tables, databases, and Excel spreadsheets are different things...