As a visualization expert, you already know that there are countless ways to represent complex data in graphs and charts. In this article, we will take a look at one of the most popular graph types, the Sankey chart, and show you how to create and analyze sankey charts to unlock your data.

What is a Sankey Chart?

A Sankey chart is a type of flow diagram that uses a network of channels to illustrate complex data flows between different sources, destinations, and variables. The Sankey chart is used to visualize data in areas such as economics, public finance, and logistics, as well as other fields where complex data flows are essential.

Before we jump into the practical side of creating sankey charts, let’s start by setting some visual context. A sankey chart typically consists of a vertical or horizontal axis, which represents time, and three sets of data: sources, destinations, and variables. Each element in the chart follows the source, passes through the channel, and reaches the destination.

How to Create a Sankey Chart

Creating a sankey chart requires designing a structure and planning how the data will be displayed. This can be a bit tricky but is also incredibly rewarding. Here’s a step-by-step guide to help you create a sankey chart:

1. Define the variables: Decide on the variables that you want to represent in your sankey chart. Each variable has its own channel and represents the flow of information or goods from one source to another destination.

2. Establish the structure: Decide on the structure of the sankey chart. This can be done in two ways:

a) Use a blank chart that is filled in later: If you have a lot of data to work with and don’t want to design the chart until the data is complete, you can use a blank chart and fill it in as you go. This method is great for fast prototyping and can help you identify potential issues or questions early on.

b) Use a fully designed chart: If you have pre-designed data and want a more professional-looking chart, you can use that chart structure and design to create a sankey diagram.

3. Create the layout: The layout of the sankey chart is similar to a network diagram. To create a layout, you must first ensure that your variables (the nodes) are placed in sequential (or in any particular order) order, and the channels (the edges) are constructed in logical order.

4. Draw the lines: To draw the sankey lines, you must first create a layout of your variables. Then, draw the lines linking each source, destination, and variable to another. Each point on the sankey chart represents a specific variable, channel, and direction.

5. Color codes: To add color to your sankey chart, you can use one or more colors to differentiate the different variables, destinations, and channels. This can be a helpful way to highlight important variables, destinations, or channels.

In addition to drawing the sankey lines, you can add labels along the lines to further explain the data flow in your chart. For example, you can label the sources, destinations, or variables to give more context to your data.

Analyzing Sankey Charts

Once you have created a sankey chart, it’s time to analyze it to uncover trends and patterns in your data. Here are a few ways you can use your sankey chart to gain insights:

1. Identify key variables: Look for variables that appear to be important or unique. These might be key drivers for change, indicators of major issues, or indicators of new trends.

2. Analyze variable flow: Look for trends in the flow of data. Do some of the variables appear to be driving changes in other variables? Are some variables dominating the flow and causing others to change?

3. Identify dependencies: Identify chains of dependency between variables. In other words, do some of the variables have a bigger influence on another variable than others?

4. Understand the flow direction: Look for patterns in the flow of data, such as a positive trend, or a negative trend. Are there some positive trends in one direction that seem to be pushing other variables?

5. Draw conclusions: Use your insights to draw conclusions about your data. Can you use your sankey chart to identify areas for improvement, uncover new trends, or better understand your data?

In conclusion, sankey charts are a great tool for unlocking complex data and uncovering important insights. By following these steps and using your sankey chart to visualize your data, you can gain deeper understanding of your data flow and uncover new opportunities to improve your business.

SankeyMaster

SankeyMaster is your go-to tool for creating complex Sankey charts . Easily enter data and create Sankey charts that accurately reveal intricate data relationships.