In this age of overwhelming information, the skill to effectively convey data has become extremely valuable. Initiating a discussion on data presentation types involves thoughtful consideration of the nature of your data and the message you aim to convey. Different types of visualizations serve distinct purposes. Whether you’re dealing with how to develop a report or simply trying to communicate complex information, how you present data influences how well your audience understands and engages with it. This extensive guide leads you through the different ways of data presentation.
Table of Contents
- What is a Data Presentation?
- What Should a Data Presentation Include?
- Bar Charts
- Line Graphs
- Dashboards
- Treemap Chart
- Heatmap
- Pie Charts
- Histogram
- Scatter Plot
- How to Choose a Data Presentation Type
- Recommended Data Presentation Templates
- Common Mistakes Done in Data Presentation
- Conclusion
- References
What is a Data Presentation?
A data presentation is a slide deck that aims to disclose quantitative information to an audience through the use of visual formats and narrative techniques derived from data analysis, making complex data understandable and actionable. This process requires a series of tools, such as charts, graphs, tables, infographics, dashboards, and so on, supported by concise textual explanations to improve understanding and boost retention rate.
Data presentations require us to cull data in a format that allows the presenter to highlight trends, patterns, and insights so that the audience can act upon the shared information. In a few words, the goal of data presentations is to enable viewers to grasp complicated concepts or trends quickly, facilitating informed decision-making or deeper analysis.
What Should a Data Presentation Include?
Data presentations go beyond the mere usage of graphical elements. Seasoned presenters encompass visuals with the art of data storytelling, so the speech skillfully connects the points through a narrative that resonates with the audience. Depending on the purpose – inspire, persuade, inform, support decision-making processes, etc. – is the data presentation format that is better suited to help us in this journey.
To nail your upcoming data presentation, ensure to count with the following elements:
- Clear Objectives: Understand the intent of your presentation before selecting the graphical layout and metaphors to make content easier to grasp.
- Engaging introduction: Use a powerful hook from the get-go. For instance, you can ask a big question or present a problem that your data will answer. Take a look at our guide on how to start a presentation for tips & insights.
- Structured Narrative: Your data presentation must tell a coherent story. This means a beginning where you present the context, a middle section in which you present the data, and an ending that uses a call-to-action. Check our guide on presentation structure for further information.
- Visual Elements: These are the charts, graphs, and other elements of visual communication we ought to use to present data. This article will cover one by one the different types of data representation methods we can use, and provide further guidance on choosing between them.
- Insights and Analysis: This is not just showcasing a graph and letting people get an idea about it. A proper data presentation includes the interpretation of that data, the reason why it’s included, and why it matters to your research.
- Conclusion & CTA: Ending your presentation with a call to action is necessary. Whether you intend to wow your audience into acquiring your services, inspire them to change the world, or whatever the purpose of your presentation, there must be a stage in which you convey all that you shared and show the path to staying in touch. Plan ahead whether you want to use a thank-you slide, a video presentation, or which method is apt and tailored to the kind of presentation you deliver.
- Q&A Session: After your speech is concluded, allocate 3-5 minutes for the audience to raise any questions about the information you disclosed. This is an extra chance to establish your authority on the topic. Check our guide on questions and answer sessions in presentations here.
Bar Charts
Bar charts are a graphical representation of data using rectangular bars to show quantities or frequencies in an established category. They make it easy for readers to spot patterns or trends. Bar charts can be horizontal or vertical, although the vertical format is commonly known as a column chart. They display categorical, discrete, or continuous variables grouped in class intervals [1]. They include an axis and a set of labeled bars horizontally or vertically. These bars represent the frequencies of variable values or the values themselves. Numbers on the y-axis of a vertical bar chart or the x-axis of a horizontal bar chart are called the scale.
Real-Life Application of Bar Charts
Let’s say a sales manager is presenting sales to their audience. Using a bar chart, he follows these steps.
Step 1: Selecting Data
The first step is to identify the specific data you will present to your audience.
The sales manager has highlighted these products for the presentation.
- Product A: Men’s Shoes
- Product B: Women’s Apparel
- Product C: Electronics
- Product D: Home Decor
Step 2: Choosing Orientation
Opt for a vertical layout for simplicity. Vertical bar charts help compare different categories in case there are not too many categories [1]. They can also help show different trends. A vertical bar chart is used where each bar represents one of the four chosen products. After plotting the data, it is seen that the height of each bar directly represents the sales performance of the respective product.
It is visible that the tallest bar (Electronics – Product C) is showing the highest sales. However, the shorter bars (Women’s Apparel – Product B and Home Decor – Product D) need attention. It indicates areas that require further analysis or strategies for improvement.
Step 3: Colorful Insights
Different colors are used to differentiate each product. It is essential to show a color-coded chart where the audience can distinguish between products.
- Men’s Shoes (Product A): Yellow
- Women’s Apparel (Product B): Orange
- Electronics (Product C): Violet
- Home Decor (Product D): Blue
Bar charts are straightforward and easily understandable for presenting data. They are versatile when comparing products or any categorical data [2]. Bar charts adapt seamlessly to retail scenarios. Despite that, bar charts have a few shortcomings. They cannot illustrate data trends over time. Besides, overloading the chart with numerous products can lead to visual clutter, diminishing its effectiveness.
For more information, check our collection of bar chart templates for PowerPoint.
Line Graphs
Line graphs help illustrate data trends, progressions, or fluctuations by connecting a series of data points called ‘markers’ with straight line segments. This provides a straightforward representation of how values change [5]. Their versatility makes them invaluable for scenarios requiring a visual understanding of continuous data. In addition, line graphs are also useful for comparing multiple datasets over the same timeline. Using multiple line graphs allows us to compare more than one data set. They simplify complex information so the audience can quickly grasp the ups and downs of values. From tracking stock prices to analyzing experimental results, you can use line graphs to show how data changes over a continuous timeline. They show trends with simplicity and clarity.
Real-life Application of Line Graphs
To understand line graphs thoroughly, we will use a real case. Imagine you’re a financial analyst presenting a tech company’s monthly sales for a licensed product over the past year. Investors want insights into sales behavior by month, how market trends may have influenced sales performance and reception to the new pricing strategy. To present data via a line graph, you will complete these steps.
Step 1: Selecting Data
First, you need to gather the data. In this case, your data will be the sales numbers. For example:
- January: $45,000
- February: $55,000
- March: $45,000
- April: $60,000
- May: $ 70,000
- June: $65,000
- July: $62,000
- August: $68,000
- September: $81,000
- October: $76,000
- November: $87,000
- December: $91,000
Step 2: Choosing Orientation
After choosing the data, the next step is to select the orientation. Like bar charts, you can use vertical or horizontal line graphs. However, we want to keep this simple, so we will keep the timeline (x-axis) horizontal while the sales numbers (y-axis) vertical.
Step 3: Connecting Trends
After adding the data to your preferred software, you will plot a line graph. In the graph, each month’s sales are represented by data points connected by a line.
Step 4: Adding Clarity with Color
If there are multiple lines, you can also add colors to highlight each one, making it easier to follow.
Line graphs excel at visually presenting trends over time. These presentation aids identify patterns, like upward or downward trends. However, too many data points can clutter the graph, making it harder to interpret. Line graphs work best with continuous data but are not suitable for categories.
For more information, check our collection of line chart templates for PowerPoint and our article about how to make a presentation graph.
Dashboards
A data dashboard is a visual tool for analyzing information. Different graphs, charts, and tables are consolidated in a layout to showcase the information required to achieve one or more objectives. Dashboards help quickly see Key Performance Indicators (KPIs). You don’t make new visuals in the dashboard; instead, you use it to display visuals you’ve already made in worksheets [3].
Keeping the number of visuals on a dashboard to three or four is recommended. Adding too many can make it hard to see the main points [4]. Dashboards can be used for business analytics to analyze sales, revenue, and marketing metrics at a time. They are also used in the manufacturing industry, as they allow users to grasp the entire production scenario at the moment while tracking the core KPIs for each line.
Real-Life Application of a Dashboard
Consider a project manager presenting a software development project’s progress to a tech company’s leadership team. He follows the following steps.
Step 1: Defining Key Metrics
To effectively communicate the project’s status, identify key metrics such as completion status, budget, and bug resolution rates. Then, choose measurable metrics aligned with project objectives.
Step 2: Choosing Visualization Widgets
After finalizing the data, presentation aids that align with each metric are selected. For this project, the project manager chooses a progress bar for the completion status and uses bar charts for budget allocation. Likewise, he implements line charts for bug resolution rates.
Step 3: Dashboard Layout
Key metrics are prominently placed in the dashboard for easy visibility, and the manager ensures that it appears clean and organized.
Dashboards provide a comprehensive view of key project metrics. Users can interact with data, customize views, and drill down for detailed analysis. However, creating an effective dashboard requires careful planning to avoid clutter. Besides, dashboards rely on the availability and accuracy of underlying data sources.
For more information, check our article on how to design a dashboard presentation, and discover our collection of dashboard PowerPoint templates.
Treemap Chart
Treemap charts represent hierarchical data structured in a series of nested rectangles [6]. As each branch of the ‘tree’ is given a rectangle, smaller tiles can be seen representing sub-branches, meaning elements on a lower hierarchical level than the parent rectangle. Each one of those rectangular nodes is built by representing an area proportional to the specified data dimension.
Treemaps are useful for visualizing large datasets in compact space. It is easy to identify patterns, such as which categories are dominant. Common applications of the treemap chart are seen in the IT industry, such as resource allocation, disk space management, website analytics, etc. Also, they can be used in multiple industries like healthcare data analysis, market share across different product categories, or even in finance to visualize portfolios.
Real-Life Application of a Treemap Chart
Let’s consider a financial scenario where a financial team wants to represent the budget allocation of a company. There is a hierarchy in the process, so it is helpful to use a treemap chart. In the chart, the top-level rectangle could represent the total budget, and it would be subdivided into smaller rectangles, each denoting a specific department. Further subdivisions within these smaller rectangles might represent individual projects or cost categories.
Step 1: Define Your Data Hierarchy
While presenting data on the budget allocation, start by outlining the hierarchical structure. The sequence will be like the overall budget at the top, followed by departments, projects within each department, and finally, individual cost categories for each project.
Example:
- Top-level rectangle: Total Budget
- Second-level rectangles: Departments (Engineering, Marketing, Sales)
- Third-level rectangles: Projects within each department
- Fourth-level rectangles: Cost categories for each project (Personnel, Marketing Expenses, Equipment)
Step 2: Choose a Suitable Tool
It’s time to select a data visualization tool supporting Treemaps. Popular choices include Tableau, Microsoft Power BI, PowerPoint, or even coding with libraries like D3.js. It is vital to ensure that the chosen tool provides customization options for colors, labels, and hierarchical structures.
Here, the team uses PowerPoint for this guide because of its user-friendly interface and robust Treemap capabilities.
Step 3: Make a Treemap Chart with PowerPoint
After opening the PowerPoint presentation, they chose “SmartArt” to form the chart. The SmartArt Graphic window has a “Hierarchy” category on the left. Here, you will see multiple options. You can choose any layout that resembles a Treemap. The “Table Hierarchy” or “Organization Chart” options can be adapted. The team selects the Table Hierarchy as it looks close to a Treemap.
Step 5: Input Your Data
After that, a new window will open with a basic structure. They add the data one by one by clicking on the text boxes. They start with the top-level rectangle, representing the total budget.
Step 6: Customize the Treemap
By clicking on each shape, they customize its color, size, and label. At the same time, they can adjust the font size, style, and color of labels by using the options in the “Format” tab in PowerPoint. Using different colors for each level enhances the visual difference.
Treemaps excel at illustrating hierarchical structures. These charts make it easy to understand relationships and dependencies. They efficiently use space, compactly displaying a large amount of data, reducing the need for excessive scrolling or navigation. Additionally, using colors enhances the understanding of data by representing different variables or categories.
In some cases, treemaps might become complex, especially with deep hierarchies. It becomes challenging for some users to interpret the chart. At the same time, displaying detailed information within each rectangle might be constrained by space. It potentially limits the amount of data that can be shown clearly. Without proper labeling and color coding, there’s a risk of misinterpretation.
Heatmap
A heatmap is a data visualization tool that uses color coding to represent values across a two-dimensional surface. In these, colors replace numbers to indicate the magnitude of each cell. This color-shaded matrix display is valuable for summarizing and understanding data sets with a glance [7]. The intensity of the color corresponds to the value it represents, making it easy to identify patterns, trends, and variations in the data.
As a tool, heatmaps help businesses analyze website interactions, revealing user behavior patterns and preferences to enhance overall user experience. In addition, companies use heatmaps to assess content engagement, identifying popular sections and areas of improvement for more effective communication. They excel at highlighting patterns and trends in large datasets, making it easy to identify areas of interest.
We can implement heatmaps to express multiple data types, such as numerical values, percentages, or even categorical data. Heatmaps help us easily spot areas with lots of activity, making them helpful in figuring out clusters [8]. When making these maps, it is important to pick colors carefully. The colors need to show the differences between groups or levels of something. And it is good to use colors that people with colorblindness can easily see.
Check our detailed guide on how to create a heatmap here. Also discover our collection of heatmap PowerPoint templates.
Pie Charts
Pie charts are circular statistical graphics divided into slices to illustrate numerical proportions. Each slice represents a proportionate part of the whole, making it easy to visualize the contribution of each component to the total.
The size of the pie charts is influenced by the value of data points within each pie. The total of all data points in a pie determines its size. The pie with the highest data points appears as the largest, whereas the others are proportionally smaller. However, you can present all pies of the same size if proportional representation is not required [9]. Sometimes, pie charts are difficult to read, or additional information is required. A variation of this tool can be used instead, known as the donut chart, which has the same structure but a blank center, creating a ring shape. Presenters can add extra information, and the ring shape helps to declutter the graph.
Pie charts are used in business to show percentage distribution, compare relative sizes of categories, or present straightforward data sets where visualizing ratios is essential.
Real-Life Application of Pie Charts
Consider a scenario where you want to represent the distribution of the data. Each slice of the pie chart would represent a different category, and the size of each slice would indicate the percentage of the total portion allocated to that category.
Step 1: Define Your Data Structure
Imagine you are presenting the distribution of a project budget among different expense categories.
Example:
- Column A: Expense Categories (Personnel, Equipment, Marketing, Miscellaneous)
- Column B: Budget Amounts ($40,000, $30,000, $20,000, $10,000)
Column B represents the values of your categories in Column A.
Step 2: Insert a Pie Chart
Using any of the accessible tools, you can create a pie chart. The most convenient tools for forming a pie chart in a presentation are presentation tools such as PowerPoint or Google Slides. You will notice that the pie chart assigns each expense category a percentage of the total budget by dividing it by the total budget.
For instance:
- Personnel: $40,000 / ($40,000 + $30,000 + $20,000 + $10,000) = 40%
- Equipment: $30,000 / ($40,000 + $30,000 + $20,000 + $10,000) = 30%
- Marketing: $20,000 / ($40,000 + $30,000 + $20,000 + $10,000) = 20%
- Miscellaneous: $10,000 / ($40,000 + $30,000 + $20,000 + $10,000) = 10%
You can make a chart out of this or just pull out the pie chart from the data.
3D pie charts and 3D donut charts are quite popular among the audience. They stand out as visual elements in any presentation slide, so let’s take a look at how our pie chart example would look in 3D pie chart format.
Step 03: Results Interpretation
The pie chart visually illustrates the distribution of the project budget among different expense categories. Personnel constitutes the largest portion at 40%, followed by equipment at 30%, marketing at 20%, and miscellaneous at 10%. This breakdown provides a clear overview of where the project funds are allocated, which helps in informed decision-making and resource management. It is evident that personnel are a significant investment, emphasizing their importance in the overall project budget.
Pie charts provide a straightforward way to represent proportions and percentages. They are easy to understand, even for individuals with limited data analysis experience. These charts work well for small datasets with a limited number of categories.
However, a pie chart can become cluttered and less effective in situations with many categories. Accurate interpretation may be challenging, especially when dealing with slight differences in slice sizes. In addition, these charts are static and do not effectively convey trends over time.
For more information, check our collection of pie chart templates for PowerPoint.
Histogram
Histograms present the distribution of numerical variables. Unlike a bar chart that records each unique response separately, histograms organize numeric responses into bins and show the frequency of reactions within each bin [10]. The x-axis of a histogram shows the range of values for a numeric variable. At the same time, the y-axis indicates the relative frequencies (percentage of the total counts) for that range of values.
Whenever you want to understand the distribution of your data, check which values are more common, or identify outliers, histograms are your go-to. Think of them as a spotlight on the story your data is telling. A histogram can provide a quick and insightful overview if you’re curious about exam scores, sales figures, or any numerical data distribution.
Real-Life Application of a Histogram
In the histogram data analysis presentation example, imagine an instructor analyzing a class’s grades to identify the most common score range. A histogram could effectively display the distribution. It will show whether most students scored in the average range or if there are significant outliers.
Step 1: Gather Data
He begins by gathering the data. The scores of each student in class are gathered to analyze exam scores.
Names | Score |
---|---|
Alice | 78 |
Bob | 85 |
Clara | 92 |
David | 65 |
Emma | 72 |
Frank | 88 |
Grace | 76 |
Henry | 95 |
Isabel | 81 |
Jack | 70 |
Kate | 60 |
Liam | 89 |
Mia | 75 |
Noah | 84 |
Olivia | 92 |
After arranging the scores in ascending order, bin ranges are set.
Step 2: Define Bins
Bins are like categories that group similar values. Think of them as buckets that organize your data. The presenter decides how wide each bin should be based on the range of the values. For instance, the instructor sets the bin ranges based on score intervals: 60-69, 70-79, 80-89, and 90-100.
Step 3: Count Frequency
Now, he counts how many data points fall into each bin. This step is crucial because it tells you how often specific ranges of values occur. The result is the frequency distribution, showing the occurrences of each group.
Here, the instructor counts the number of students in each category.
- 60-69: 1 student (Kate)
- 70-79: 4 students (David, Emma, Grace, Jack)
- 80-89: 7 students (Alice, Bob, Frank, Isabel, Liam, Mia, Noah)
- 90-100: 3 students (Clara, Henry, Olivia)
Step 4: Create the Histogram
It’s time to turn the data into a visual representation. Draw a bar for each bin on a graph. The width of the bar should correspond to the range of the bin, and the height should correspond to the frequency. To make your histogram understandable, label the X and Y axes.
In this case, the X-axis should represent the bins (e.g., test score ranges), and the Y-axis represents the frequency.
The histogram of the class grades reveals insightful patterns in the distribution. Most students, with seven students, fall within the 80-89 score range. The histogram provides a clear visualization of the class’s performance. It showcases a concentration of grades in the upper-middle range with few outliers at both ends. This analysis helps in understanding the overall academic standing of the class. It also identifies the areas for potential improvement or recognition.
Thus, histograms provide a clear visual representation of data distribution. They are easy to interpret, even for those without a statistical background. They apply to various types of data, including continuous and discrete variables. One weak point is that histograms do not capture detailed patterns in students’ data, with seven compared to other visualization methods.
Scatter Plot
A scatter plot is a graphical representation of the relationship between two variables. It consists of individual data points on a two-dimensional plane. This plane plots one variable on the x-axis and the other on the y-axis. Each point represents a unique observation. It visualizes patterns, trends, or correlations between the two variables.
Scatter plots are also effective in revealing the strength and direction of relationships. They identify outliers and assess the overall distribution of data points. The points’ dispersion and clustering reflect the relationship’s nature, whether it is positive, negative, or lacks a discernible pattern. In business, scatter plots assess relationships between variables such as marketing cost and sales revenue. They help present data correlations and decision-making.
Real-Life Application of Scatter Plot
A group of scientists is conducting a study on the relationship between daily hours of screen time and sleep quality. After reviewing the data, they managed to create this table to help them build a scatter plot graph:
Participant ID | Daily Hours of Screen Time | Sleep Quality Rating |
---|---|---|
1 | 9 | 3 |
2 | 2 | 8 |
3 | 1 | 9 |
4 | 0 | 10 |
5 | 1 | 9 |
6 | 3 | 7 |
7 | 4 | 7 |
8 | 5 | 6 |
9 | 5 | 6 |
10 | 7 | 3 |
11 | 10 | 1 |
12 | 6 | 5 |
13 | 7 | 3 |
14 | 8 | 2 |
15 | 9 | 2 |
16 | 4 | 7 |
17 | 5 | 6 |
18 | 4 | 7 |
19 | 9 | 2 |
20 | 6 | 4 |
21 | 3 | 7 |
22 | 10 | 1 |
23 | 2 | 8 |
24 | 5 | 6 |
25 | 3 | 7 |
26 | 1 | 9 |
27 | 8 | 2 |
28 | 4 | 6 |
29 | 7 | 3 |
30 | 2 | 8 |
31 | 7 | 4 |
32 | 9 | 2 |
33 | 10 | 1 |
34 | 10 | 1 |
35 | 10 | 1 |
In the provided example, the x-axis represents Daily Hours of Screen Time, and the y-axis represents the Sleep Quality Rating.
The scientists observe a negative correlation between the amount of screen time and the quality of sleep. This is consistent with their hypothesis that blue light, especially before bedtime, has a significant impact on sleep quality and metabolic processes.
There are a few things to remember when using a scatter plot. Even when a scatter diagram indicates a relationship, it doesn’t mean one variable affects the other. A third factor can influence both variables. The more the plot resembles a straight line, the stronger the relationship is perceived [11]. If it suggests no ties, the observed pattern might be due to random fluctuations in data. When the scatter diagram depicts no correlation, whether the data might be stratified is worth considering.
How to Choose a Data Presentation Type
Choosing the appropriate data presentation type is crucial when making a presentation. Understanding the nature of your data and the message you intend to convey will guide this selection process. For instance, when showcasing quantitative relationships, scatter plots become instrumental in revealing correlations between variables. If the focus is on emphasizing parts of a whole, pie charts offer a concise display of proportions. Histograms, on the other hand, prove valuable for illustrating distributions and frequency patterns.
Bar charts provide a clear visual comparison of different categories. Likewise, line charts excel in showcasing trends over time, while tables are ideal for detailed data examination. Starting a presentation on data presentation types involves evaluating the specific information you want to communicate and selecting the format that aligns with your message. This ensures clarity and resonance with your audience from the beginning of your presentation.
Recommended Data Presentation Templates
Common Mistakes Done in Data Presentation
Overwhelming visuals
One of the mistakes related to using data-presenting methods is including too much data or using overly complex visualizations. They can confuse the audience and dilute the key message.
Inappropriate chart types
Choosing the wrong type of chart for the data at hand can lead to misinterpretation. For example, using a pie chart for data that doesn’t represent parts of a whole is not right.
Lack of context
Failing to provide context or sufficient labeling can make it challenging for the audience to understand the significance of the presented data.
Inconsistency in design
Using inconsistent design elements and color schemes across different visualizations can create confusion and visual disarray.
Failure to provide details
Simply presenting raw data without offering clear insights or takeaways can leave the audience without a meaningful conclusion.
Lack of focus
Not having a clear focus on the key message or main takeaway can result in a presentation that lacks a central theme.
Visual accessibility issues
Overlooking the visual accessibility of charts and graphs can exclude certain audience members who may have difficulty interpreting visual information.
In order to avoid these mistakes in data presentation, presenters can benefit from using presentation templates. These templates provide a structured framework. They ensure consistency, clarity, and an aesthetically pleasing design, enhancing data communication’s overall impact.
Conclusion
Understanding and choosing data presentation types are pivotal in effective communication. Each method serves a unique purpose, so selecting the appropriate one depends on the nature of the data and the message to be conveyed. The diverse array of presentation types offers versatility in visually representing information, from bar charts showing values to pie charts illustrating proportions.
Using the proper method enhances clarity, engages the audience, and ensures that data sets are not just presented but comprehensively understood. By appreciating the strengths and limitations of different presentation types, communicators can tailor their approach to convey information accurately, developing a deeper connection between data and audience understanding.
If you need a quick method to create a data presentation, check out our AI presentation maker. A tool in which you add the topic, curate the outline, select a design, and let AI do the work for you.
References
[1] Government of Canada, S.C. (2021) 5 Data Visualization 5.2 Bar Chart, 5.2 Bar chart. https://www150.statcan.gc.ca/n1/edu/power-pouvoir/ch9/bargraph-diagrammeabarres/5214818-eng.htm
[2] Kosslyn, S.M., 1989. Understanding charts and graphs. Applied cognitive psychology, 3(3), pp.185-225. https://apps.dtic.mil/sti/pdfs/ADA183409.pdf
[3] Creating a Dashboard. https://it.tufts.edu/book/export/html/1870
[4] https://www.goldenwestcollege.edu/research/data-and-more/data-dashboards/index.html
[5] https://www.mit.edu/course/21/21.guide/grf-line.htm
[6] Jadeja, M. and Shah, K., 2015, January. Tree-Map: A Visualization Tool for Large Data. In GSB@ SIGIR (pp. 9-13). https://ceur-ws.org/Vol-1393/gsb15proceedings.pdf#page=15
[7] Heat Maps and Quilt Plots. https://www.publichealth.columbia.edu/research/population-health-methods/heat-maps-and-quilt-plots
[8] EIU QGIS WORKSHOP. https://www.eiu.edu/qgisworkshop/heatmaps.php
[9] About Pie Charts. https://www.mit.edu/~mbarker/formula1/f1help/11-ch-c8.htm
[10] Histograms. https://sites.utexas.edu/sos/guided/descriptive/numericaldd/descriptiven2/histogram/[11] https://asq.org/quality-resources/scatter-diagram