When working with complex data sets, it can be challenging to see the underlying relationships between different variables and components. To help visualize these relationships, a tool called a Sankey chart is a popular choice. A Sankey chart visualizes a hierarchical network, combining flow diagrams and bar charts.
In this article, we will explore how to create a Sankey chart, provide examples of how they can be used, and discuss some of their key features. Additionally, we will highlight the importance of using Sankey charts in complex data analysis.
Understanding Hierarchical Networks and Sankey Charts
In order to create a Sankey chart, we need to understand what a hierarchical network is. A hierarchical network is a graph that consists of a set of nodes, where some of the nodes can be hierarchical relationships. These relationships can be direct or indirect, and can connect various elements of a network. Sankey charts are used to visualize hierarchical networks by creating a flow diagram that shows how information moves through the network.
Creating a Sankey Chart
To create a Sankey chart, you will need to follow these general steps:

1. Start by determining the hierarchical structure of the network you want to visualize. This may involve creating a network that includes nodes and links.
2. Use the nodes of the network to build the flow diagram. In Sankey charts, you create a flow diagram by connecting each node to the next one, with arrows pointing from the first node to the second, and so on. Each node represents an element of the network, such as a variable or a component.
3. Determine the direction of the flow by specifying whether information flows from one node to another, or from one node to multiple nodes.
4. Mark up the flow diagram to provide labels for each node, arrow heads, and directions.
5. Create a bar chart using the flow diagram as a reference. The bar chart will show the flow of information through the network, measured in units such as mass, volume, or cost.

Sankey charts are an effective way to visualize hierarchical networks because they combine two types of information visualization: flow diagrams and bar charts. The flow diagram provides a detailed look at the structure of the network, while the bar chart offers a quantitative view of the information flow. Together, these components help to provide a holistic view of the network and its relationships.
Applications of Sankey Charts
Sankey charts are used in many different fields to visualize hierarchical networks, including business analytics, environmental science, and engineering. Here are some examples of how they can be used:

• Business analytics: In business analytics, Sankey charts can be used to display supply chain information, such as how products move between suppliers and customers. The graph can highlight areas of the network that are bottleneck or critical, and provide a framework for improving supply chain efficiency.
• Environmental science: Sankey charts can be used to compare the flow of pollutants between different locations, such as rivers, lakes, and oceans. This can help to reveal where pollution is coming from and identify areas that need to be addressed in terms of water quality.
• Engineering: In engineering, Sankey charts can be used to visualize the flow of materials and information in a complex system, such as a pipeline or a manufacturing plant. This can help to identify areas that need to be improved or optimized.

In addition to these examples, Sankey charts can also be used in many other fields that involve hierarchical networks, such as medicine, economics, and public policy. The key feature of Sankey charts is that they provide a visual representation of the relationships between different elements in a network, which can be valuable in complex data analysis.

Conclusion
Sankey charts are an effective tool for visualizing hierarchical networks, using flow diagrams and bar charts to provide a comprehensive view of the network. They are commonly used in a wide range of fields, including business analytics, environmental science, engineering, and more. By visualizing the relationships between different elements in a network, Sankey charts can help to identify areas of the network that are bottlenecks, and guide efforts to improve the flow of information and resources.

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.