Data visualization is a branch of data science that visually represents the data and information collected, thus transforming raw data into valuable information.
Its enormous usefulness facilitates understanding information using graphs, maps, diagrams, figures, and colors. In short, data visualization allows information to be more accessible and within reach of more people.
For example, data visualization is tremendously helpful in making better decisions in the business world.
Such is the value and usefulness of data visualization, and many tools related to data analytics, especially those intended for non-specialized users, include data visualization functionalities.
Below, we show you the different types of data visualization that exist and how you can put this branch of data analysis into practice, but only by giving you some valuable tips so that you make as few mistakes as possible.
Data visualization is divided depending on the graphic resource used to display the data. In that sense, there is a wide variety of formats, but below, we will tell you about the most popular and most commonly used ones.
It is the most widespread form of data visualization because it is intuitive and easy to understand.
Graphs represent data using lines, bars, points or figures.
The most famous and popular diagram in the world is the family tree. In that sense, diagrams usually show the relationship that exists between all of them or a specific process rather than showing the data.
Therefore, while a graph can visually indicate the percentage or quantity of an element, a diagram shows how they influence each other, how they have been transformed, or how they evolve. Diagrams can also be used to indicate quantities.
Maps are used when data related to geographic, political, or sociodemographic information is to be represented and when differences between continents, countries, or locations are to be shown.
The best-known are color maps, in which a tone is assigned to each numerical value or numerical strip, and the part of the map identified with it is colored.
Other prevalent ones are also animated maps and point maps.
When representing the data, we must consider several issues so that the public understands what we want to convey as best as possible.
It is common for the different visual resources obtained from data visualization to be presented in a presentation or meeting.
These are the most common errors when presenting a data visualization. Remember them during your data analysis process, and we also tell you how to avoid them.
No matter how much data you have, you must be selective with the information you decide to capture in your data visualization presentation. Otherwise, you may overwhelm your audience, and they may need help understanding the intention and objective of your presentation.
No matter how attractive all the data you have collected is, select only those that directly affect the central topic of your presentation. If you find it very difficult to get rid of some, you can dedicate an extra presentation section to show them once you have finished exposing the central part.
Although you may see it as a minor detail, colour is one of the essential elements in data visualization. It allows the public to differentiate different data and classify it in their minds quickly. Furthermore, even though you may not believe it, colours help a lot in memorizing concepts.
For these reasons, using very similar colours will complicate understanding your data visualization.
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I recommend that you do not use different shades of the same colour. Still, other colours assign each piece of information or concept a colour that defines it, although the latter may be subjective.
Neither too much nor too bald. Although colour is essential in data visualization, you should stay moderate. Using too many colours can overwhelm the audience and cause them not to differentiate the information. In short, an excess of colour has the same effect as an excess of information.
To avoid this, capture only a few variables or factors in the same graph, diagram or map; select only those that will add value and that matter.
You can also group different data that have some similarity under the same variable and thus reduce the number of elements you must colour.
This is one reason people are grouped into different age groups in the graphs (18-25, 26-45, and 65+) and why a bar is not used for each age group.
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