I find Sankey diagrams super useful for illustrating flows of people or preferences. The networkD3 package in R offers a straightforward way to generate these diagrams without needing to know the ins and outs of the actual D3 code. To show you what I mean, I generated a Sankey diagram to show how the twelve regions of the UK contributed to the overall result of the Brexit referendum, where voters chose to leave the European Union by 17, votes to 16, If you want to see the fully interactive Sankey diagram for this, you can view the code via an RMarkdown document on RPubs here.
Unfortunately only static images can be displayed on Medium. The first step is to get our libraries loaded and to get the data into R. Since the data is very detailed down to the most localized voting centers, we need to aggregate all the Leave and Remain votes to get a total for each region. We then need to create two dataframes for use by networkD3 in its sankeyNetwork function:.
Here is some simple code to build the data in this way:. Now that we have our data constructed the right way, we can simply use the networkDsankeyNetwork function to create the diagram. This produces a simple, effective diagram, with rollover interactivity displaying the details of each voting flow. The static version is presented here.
I am passionate about applying the rigor of all those disciplines to complex people questions. Find me on LinkedIn or on Twitter. Sign in. Using networkD3 in R to create simple and clear Sankey diagrams.
Keith McNulty Follow. Towards Data Science A Medium publication sharing concepts, ideas, and codes. Analytics leader at McKinsey. I am interested in Mathematics disciplines and People disciplines.
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Towards Data Science Follow. A Medium publication sharing concepts, ideas, and codes. See responses 1. More From Medium. More from Towards Data Science. Edouard Harris in Towards Data Science. Rhea Moutafis in Towards Data Science.Hi, stumbled upon your work here and think it's great to be putting this kind of stuff out there!
New to D3, but as a long-time programmer, I thought I'd provide answers for the two questions you posed: 1 the layout function lets you set how many 'passes' are performed by an algorithm trying to optimally place the nodes so they don't overlap. The higher the number, the better the placement -- but the longer it takes to run. I'll try to get my company to pay for a copy for us : -scott southworth. Thanks for the info Scott. That's really good to know.
I hope you enjoy D3. It certainly seems to be rising in popularity! Hi, It is nice work. Thank you for the article. I want to use sankey for generating visitors flow diagram as in google analytics. Thank you for your kind comments. What you're trying to achieve would be a body of work that would consume more time than I have available I'm afraid.
Start by creating a Github account and getting you code up there and this will assist others to troubleshoot for you where you have problems. Sorry I couldn't be of more help, but my time is extremely limited and I know that the community has a wealth of people more experienced than me that can assist. Good luck and I look forward to seeing your results. Great article! I've been trying to create a sankey diagram of some travel patterns, and every time I run it I get an error telling me that 'nodes' is undefined despite the fact that my json is defining them.
Possibly even though you json might be correctly formatted, if your code isn't injesting it and assigning it correctly you might have problems. If you get desperate post your code and a sample of the json onto stack overflow as a question. But as a first step, pare your json and your code down to a minimum to test or start with a known good example and then start integrating your json data and adapt from there.
Good luck and let us know how you get on. Thanks for laying all these examples out - I'm new to D3 and not a programmer, so it definitely helps to have your explorations! A question on the sankey diagram Glad you're having a go at d3! Disabling the mouse drag should be as easy as commenting out or just remove the section that calls the 'mousedrag' function.
First and foremost though, have a play with the code! Make a tiny change to a part and see what happens.
You'll be amazed what you learn! But yes, it's fantastic when it works! One more question I'm assuming that I can add additional information to both nodes and links - the data set your working with just has source, target, and value for links.
Using networkD3 in R to create simple and clear Sankey diagrams
Can I have additional key:value pairs in there, or will that break sankey? I'm asking because sankey is choking on something and trying to consider what is different from my data and the example.
I know what you mean! Yes, you can certainly add more information to the nodes and links. They could be used for tooltip info or perhaps now that I think about it, colours or opacity. I should save that thought for later. The json certainly does need to be correctly formed.A Sankey diagram is a flow diagram, in which the width of arrows is proportional to the flow quantity.
Sankey diagrams visualize the contributions to a flow by defining source to represent the source node, target for the target node, value to set the flow volum, and label that shows the node name. This example also uses hovermode to enable multiple tooltips.
Links and nodes have their own hovertemplate, in which link- or node-specific attributes can be displayed. To add more data to links and nodes, it is possible to use the customdata attribute of link and nodesas in the following example.
Everywhere in this page that you see fig. Figure go. What About Dash? Figure or any Plotly Express function e. Dash app.
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Thanks so much for your site. It is very helpful. Of course it needs more substantial tests than the simple. Just as another note, I discovered that the sankey. Maybe this will help someone in the future as the try these out. Great work. I shall have to have a play. Yeah, I understand about the loop business, but there are a couple of folks who have worked on solutions. I haven't played with either yet. I've had a play and I like it a lot. There are parts where I don;t know exactly how it works, but it sure does work!
I've updated the post above to include a description of the code and I've updated the book D3 Tips and Tricks as well with what I hope is appropriate attribution Many thanks timelyportfolio. The d3. First of all, thank you for doing this. I've been looking for something like this for a while. I tried it with a simple data set that I put together manually, and everything seemed to work great. However, when I tried it on a much larger sample set that was compiled from information pulled from my existing database, my browser started throwing script time outs.
I'm glad you found it useful. I've found similar problems to what you describe when trying to use very large data sets. For force diagrams, I think the browser is having to do a lot of work all those interacting forces seem like a lot of mathsand the more nodes you have, the bigger the problem.
However, I think that the following might help. Use Google Chrome. I also know that this is out of your control if your creating a graph for others to use, but if you're doing it for yourself, it's an option.
Don't use opacity on objects in the graph. I know it sounds trite, but again, that's a lot of work for the browser to carry out. Neither of these is a perfect solution, but for really large data sets, you're fighting a difficult battle for any visualization.
I'd be interested if any other readers have an opinion. Alternatively, it you're able to post your code into a question on Stack Overflow, there are some very smart people in that forum who may be able to help. Good luck.
Thanks for your quick response.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Sankey diagrams show flows between processes or relationships between sets.
This library, is a reusable d3 diagram featuring:. See the demo for examples of these. Or download the standalone bundle and include in your page as. Try more live examples. If you use the Jupyter notebook, try ipysankeywidget.R package tutorial: networkD3
Thanks for your interest in contributing! We have a Roadmap showing what we are working on, and you can browse the list of good first issues for ideas. See the live examples to get an idea of what it does. Apply the layout to the given arguments. The arguments are arbitrary; they are simply propagated to the accessor functions nodes and links. If nodes is specified, sets the nodes accessor to the specified function and returns this layout. If nodes is not specified, return the current accessor, which defaults to:.
If links is specified, sets the links accessor to the specified function and returns this layout. If links is not specified, return the current accessor, which defaults to:.
If nodeId is specified, sets the node id accessor to the specified function and returns this layout. If nodeId is not specified, return the current accessor, which defaults to:. See below for more discussion of ports. If this accessor returns a string, it is interpreted as the node id and the port is set to undefined.
If nodeBackwards is specified, sets the node direction accessor to the specified function and returns this layout. If nodeBackwards is not specified, return the current accessor, which defaults to:. If linkValue is specified, sets the link value accessor to the specified function and returns this layout.
If linkValue is not specified, return the current accessor, which defaults to:. If linkType is specified, sets the link type accessor to the specified function and returns this layout.
If linkType is not specified, return the current accessor, which defaults to:. If ordering is specified, sets the node ordering to the specified value and returns this layout.
If ordering is not specified, return the current value, which defaults to null. When ordering is specified, it is used directly and no rank assignment or ordering algorithm takes place.
The ordering structure has three nested lists: ordering is a list of layers, each of which is a list of bands, each of which is a list of node ids. For example. If rankSets is specified, sets the rank sets to the specified value and returns this layout. If rankSets is not specified, return the current value, which defaults to .
If sortPorts is specified, sets the port sorting function to the specified function and returns this layout. If sortPorts is not specified, return the current value, which defaults to:. Note : in a future version this may be changed to sort ports to avoid crossings by default.The above example is intended to demonstrate drawing a simple Sankey diagram using v4 of d3. It uses Jason Davies' version of the Sankey plugin. This is one of the code samples for the update to the book D3 Tips and Tricks to version 4 of d3.
Dear d3noob. Thanks for sharing the example using D3v4. I noticed that until version 0. I'll be grateful if you could contribute a new example using the latest version of d3Sankey that does not have sankey. Skip to content. Instantly share code, notes, and snippets.
Code Revisions 3 Stars 5 Forks 6. Embed What would you like to do? Embed Embed this gist in your website. Share Copy sharable link for this gist. Learn more about clone URLs. Download ZIP. Sankey Diagram with v4. This comment has been minimized. Sign in to view. Copy link Quote reply. Dear d3noobThanks for sharing the example using D3v4. Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment. You signed in with another tab or window. Reload to refresh your session.
I am looking for a DefinitelyTyped file for the plugin. Simply use them with npm as indicated above. The PR to update the actual API documentation of d3-sankey to reflect the source code is still awaiting a merge here.
You need to expand the definition of the d3 type to include the sankey method and the methods it accepts. At the absolute minimum, you need to extend the d3 module with a declaration file to make clear that d3 has been extended with the d3-sankey module. You do so by creating a definition file that you place within the types directly with the following contents:.
Sankey diagram with horizontal and vertical node movement
This tells TS that there is a d3 module, and that it exports the function listed. If the d3 module already exists, it extends that module. Learn more. Typescript Type definition for d3 sankey Ask Question. Asked 3 years, 1 month ago. Active 2 years, 11 months ago. Viewed times. Is there any other location where I can get this file from? The code in d3 plugin looks something like this: d3. AgentHunt AgentHunt 3 3 gold badges 8 8 silver badges 23 23 bronze badges.
Active Oldest Votes. Rich Seviora Rich Seviora 1, 12 12 silver badges 14 14 bronze badges. I tried creating the file with declaration and placed it in my types directory, along with other definition files for d3, jquery etc. However, it seems my application is unable to load the definition.
Does the index.