Chart Type Guide
A Handy Guide to Help Choose the Best Chart Type, via extremepresentation.com

Types of Charts: Choose the Best Chart to Convey Your Message

You’ve got your data, you’ve made some sense of it, and now it is time to communicate your results.  Great!  This article will provide examples of many types of charts and graphs and explain how to pick the best one for your data depending on the message you want to convey.

Choosing a type of chart depends first and foremost on what kind of data you have and what you want to express.  I find that charts and graphs are typically used to convey one of the following: comparisons/relationships, distribution, trends, composition, flow/process, or location.

1. Comparison/Relationship Charts – Pretty self explanatory, right?  You have data on two or more variables and you want to show them together, probably to show a correlation or pattern of some type.  Examples might include MPG of three different cars, average heights according to race, etc.  Bar charts and line charts, or combinations of the two, are very commonly used for the purpose of comparison.

Happiness over time (via Business Insider)
Example of a simple line chart showing the relationship of happiness to age (via Business Insider)

Venn diagrams are especially useful to show relationships.  These are typically qualitative in nature.

Venn Diagram
 Funny Venn Diagram, Source: I Love Charts

By the way, Venn diagrams can be pretty funny.  Here’s a set of 12 good ones from Mental Floss, and an example of someone not understanding how they work.  

2. Distribution Charts – These types of charts aim to convey “what is the distribution?” of my data.  For example, let’s say you did a survey and you asked everyone their age.  A distribution chart would be useful to visualize the distribution of ages among respondents.  Column and Line Histogram charts are probably the most common forms of distribution charts.  Scatter plot charts are also great for this purpose.

Column Histogram Chart
 Column Histogram Chart
scatter plot chart
 scatter plot chart
Scatter Charts in MS Excel
 Scatter Charts in MS Excel

Word clouds are an interesting way to visualize the frequency distribution of words with textual data.  Here’s an example of a word cloud from the 2011 Academy Award acceptance speeches.  While these aren’t the solution to the world’s problems, they can be useful from time to time in quickly analyzing open-ended comments from surveys and could be considered a type of chart.

wordle word cloud oscar speech
 Word Cloud Oscars 2011

3. Charts that show Trends – While the chart categories mentioned above can certainly show trends, I think it is deserving to identify this as a category of its own. The most common way to show trends over time is with a line chart.  Nowhere is this more common than in showing stock price trends over time.  The chart below is a “candlestick” chart.

Stock Candlestick Chart
 Stock Candlestick Chart

Here is a good article if you want to learn more about stock market charts.

If you have a few extra minutes, here’s an incredible video of the late Hans Rosling of Gapminder showing charts in motion, demonstrating both relationships and trends all at once.

4. Composition Charts – The type of chart is “composition” charts, which attempt to show viewers “this is how my data is composed.”  By far, the most common “composition” chart is a pie chart.  A pie chart might show that 60% of my survey respondents were composed of women and 40% were men.

Funny Pie Chart Funny Pie Chart (source)

Pie Charts MS Excel
Pie Chart Option found in MS Excel

I like using doughnut charts as a variation on the all-too-common pie chart.

Doughnut Charts
Doughnut Charts

5. Flow/Process Charts – Flow charts are used to show–you guessed it–the flow of a process.  These are often used to guide a decision.  In fact, they are often called “decision trees.”  Here’s a couple of examples:

Flow Chart
Flow Chart
Funny Flow Chart
Funny Flow Chart, Source

6. Location Charts (Maps) – Geographical maps and data overlays on maps are another type of chart that cannot be left off this list.  Of course, everyone knows about basic maps, but take a look at some of these map-inspired charts and graphs:

World Map Based on Population
World Map Based on Population, Source: WorldMapper
Crime Map Oakland, CA
Crime Map Oakland, CA

Advanced Charts and Data Visualizations 

Most of the charts and graphs shown above are pretty traditional.  Data visualization is a hot field and there are many new cool forms of “charts” emerging.  Calling them “charts” doesn’t do them justice.  I’ll dedicate more time to this in another article, but here’s a sample of what I’m talking about.

Advanced Data Visualization
Advanced Data Visualization, Source: Information is Beautiful
Infographic
Infographic, Source: Information is Beautiful

The winner of the 2018 Information is Beautiful Awards (shown below) is both art and data communication all at once.  The “chart” (source) by Pedro M Cruz & team illustrates US immigration over time using the visual metaphor of tree cross section.  Wow. 

That’s about it.  I’ve leave you with some links to additional information.

Additional Links and Information

The best guide for choosing a chart that I’ve found to date is this one, which is itself a new kind of chart: a flow chart. They’ve narrowed down the categories of charts down to four.

Chart Types
Chart Types, from Extreme Presentation

“Juice Labs” has a nice tool they call the “chart chooser.”  It allows you to filter based on your needs.  Another option is the chooser from Chart Guide.

Finally, here is a nice infographic from online-behavior.com (snippet below) explaining a wide variety of chart types.  I also like the handy PDF from Experception

Chart Type Infographic
Chart Type Infographic, Source: online-behavior.com

I hope this article was informative and that you have a better understanding of the types of charts and graphs out there in the world.  If you have any additions or comments, please chime in below.

6 thoughts on “Types of Charts: Choose the Best Chart to Convey Your Message”

  1. Thank you for explaining of measurement scales . I couldn’t grasp the research process until i read your article. You’re a brilliant teacher. Thank s for sharing your knowledge. WOW

  2. I know nothing about Marketing, Excel or Statistics and the information you just exposed to me through this article completely enlightened me to the point that I feel I can delve into all of the above with confidence. Thank you!

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