In response to this Stack Overflow question Adding Color to Sankey Diagram in rCharts, I put this quick example together to demonstrate one way of handling.
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December 20, 2016 19:08
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color your d3 sankey using rCharts
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| require(rCharts) | |
| require(plyr) | |
| gallery <- read.csv( | |
| "https://docs.google.com/spreadsheet/pub?key=0AovoNzJt5GetdEhQVDgyYXpJMnZ2M2J2YmtvX0I5Snc&output=csv", | |
| stringsAsFactors = FALSE | |
| ) | |
| gallery.use <- gallery[,c("technology","visualizationType","documentType","author")] | |
| colnames(gallery.use) <- rep("column",4) | |
| gallery.edge <- rbind( | |
| gallery.use[,1:2], | |
| gallery.use[,2:3], | |
| gallery.use[,3:4], | |
| deparse.level=1 | |
| ) | |
| colnames(gallery.edge) <- c("source","target") | |
| gallery.edge <- ddply(gallery.edge,~source+target,nrow) | |
| colnames(gallery.edge) <- c("source","target","value") | |
| #verify that no source = target | |
| #or will get stuck in infinite loop | |
| gallery.edge[which(gallery.edge[,1]==gallery.edge[,2]),] | |
| gallery.edge$source <- as.character(gallery.edge$source) | |
| gallery.edge$target <- as.character(gallery.edge$target) | |
| sankeyPlot2 <- rCharts$new() | |
| sankeyPlot2$setLib('http://timelyportfolio.github.io/rCharts_d3_sankey/') | |
| sankeyPlot2$set( | |
| data = gallery.edge, | |
| nodeWidth = 15, | |
| nodePadding = 10, | |
| layout = 32, | |
| width = 960, | |
| height = 500 | |
| ) | |
| sankeyPlot2$setTemplate( | |
| afterScript = " | |
| <script> | |
| // to be specific in case you have more than one chart | |
| d3.selectAll('#{{ chartId }} svg path.link') | |
| .style('stroke', function(d){ | |
| //here we will use the source color | |
| //if you want target then sub target for source | |
| //or if you want something other than gray | |
| //supply a constant | |
| //or use a categorical scale or gradient | |
| return d.source.color; | |
| }) | |
| //note no changes were made to opacity | |
| //to do uncomment below but will affect mouseover | |
| //so will need to define mouseover and mouseout | |
| //happy to show how to do this also | |
| // .style('stroke-opacity', .7) | |
| </script> | |
| ") | |
| sankeyPlot2 |
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| <!doctype HTML> | |
| <meta charset = 'utf-8'> | |
| <html> | |
| <head> | |
| <link rel='stylesheet' href='http://timelyportfolio.github.io/rCharts_d3_sankey//css/sankey.css'> | |
| <script src='http://timelyportfolio.github.io/rCharts_d3_sankey//js/d3.v3.js' type='text/javascript'></script> | |
| <script src='http://timelyportfolio.github.io/rCharts_d3_sankey//js/sankey.js' type='text/javascript'></script> | |
| <style> | |
| .rChart { | |
| display: block; | |
| margin-left: auto; | |
| margin-right: auto; | |
| width: 960px; | |
| height: 500px; | |
| } | |
| </style> | |
| </head> | |
| <body > | |
| <div id = 'chart21541f297cdc' class = 'rChart rCharts_d3_sankey'></div> | |
| <!--Attribution: | |
| Mike Bostock https://github.com/d3/d3-plugins/tree/master/sankey | |
| Mike Bostock http://bost.ocks.org/mike/sankey/ | |
| --> | |
| <script> | |
| (function(){ | |
| var params = { | |
| "dom": "chart21541f297cdc", | |
| "width": 960, | |
| "height": 500, | |
| "data": { | |
| "source": [ "area", "bar chart", "bar chart", "block matrix", "blog post", "blog post", "bump chart", "cal-heatmap", "calendar heatmap", "choropleth map", "combination", "combination", "correlation matrix", "cumulative line", "custom", "d3", "d3", "d3", "d3", "d3", "dashboard", "dashifyr", "datamaps", "datatables", "dimple", "dimple", "dimple", "dimple", "dimple", "dygraphs", "error bar", "gallery", "gallery", "heat map", "highcharts", "highcharts", "highcharts", "highcharts", "horizon", "horizon", "leaflet", "line chart", "line chart", "line chart", "map", "morris", "morris", "multiple", "multiple", "multiple", "multiple", "nvd3", "nvd3", "nvd3", "parallel coordinates", "parallel coordinates", "parcoords", "polychart", "polychart", "polychart", "polychart", "rickshaw", "rickshaw", "sankey", "sankey", "sankey", "scatter", "scatter", "scatterplot", "shinyapp", "standalone visualization", "standalone visualization", "standalone visualization", "standalone visualization", "standalone visualization", "standalone visualization", "standalone visualization", "table", "timeline", "timelinejs", "tutorial", "tutorial" ], | |
| "target": [ "standalone visualization", "blog post", "standalone visualization", "standalone visualization", "Kyle Walker", "TimelyPortfolio", "standalone visualization", "calendar heatmap", "standalone visualization", "standalone visualization", "multiple", "scatterplot", "standalone visualization", "tutorial", "standalone visualization", "cumulative line", "custom", "error bar", "horizon", "sankey", "shinyapp", "dashboard", "choropleth map", "table", "bar chart", "block matrix", "multiple", "scatter", "scatterplot", "line chart", "standalone visualization", "TimelyPortfolio", "Vivek Patil", "standalone visualization", "area", "bar chart", "line chart", "scatterplot", "standalone visualization", "tutorial", "map", "blog post", "standalone visualization", "tutorial", "shinyapp", "line chart", "multiple", "gallery", "shinyapp", "standalone visualization", "tutorial", "bar chart", "line chart", "scatterplot", "standalone visualization", "tutorial", "parallel coordinates", "correlation matrix", "heat map", "multiple", "scatterplot", "bump chart", "multiple", "blog post", "standalone visualization", "tutorial", "standalone visualization", "tutorial", "standalone visualization", "Ramnath Vaidyanathan", "Alex Bresler", "Ian Dunham", "pssGuy", "Ramnath Vaidyanathan", "Thomas Reinholdsson", "TimelyPortfolio", "Vivek Patil", "standalone visualization", "standalone visualization", "timeline", "Ramnath Vaidyanathan", "TimelyPortfolio" ], | |
| "value": [ 2, 2, 5, 1, 3, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 5, 1, 1, 1, 4, 4, 1, 3, 2, 1, 2, 1, 3, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 4, 1, 1, 5, 2, 1, 1, 1, 1, 2, 1, 1, 4, 1, 1, 1, 1, 3, 1, 1, 1, 5, 3, 2, 1, 2, 8, 2, 15, 6, 4, 2, 2, 2, 9 ] | |
| }, | |
| "nodeWidth": 15, | |
| "nodePadding": 10, | |
| "layout": 32, | |
| "id": "chart21541f297cdc" | |
| }; | |
| params.units ? units = " " + params.units : units = ""; | |
| //hard code these now but eventually make available | |
| var formatNumber = d3.format("0,.0f"), // zero decimal places | |
| format = function(d) { return formatNumber(d) + units; }, | |
| color = d3.scale.category20(); | |
| if(params.labelFormat){ | |
| formatNumber = d3.format(".2%"); | |
| } | |
| var svg = d3.select('#' + params.id).append("svg") | |
| .attr("width", params.width) | |
| .attr("height", params.height); | |
| var sankey = d3.sankey() | |
| .nodeWidth(params.nodeWidth) | |
| .nodePadding(params.nodePadding) | |
| .layout(params.layout) | |
| .size([params.width,params.height]); | |
| var path = sankey.link(); | |
| var data = params.data, | |
| links = [], | |
| nodes = []; | |
| //get all source and target into nodes | |
| //will reduce to unique in the next step | |
| //also get links in object form | |
| data.source.forEach(function (d, i) { | |
| nodes.push({ "name": data.source[i] }); | |
| nodes.push({ "name": data.target[i] }); | |
| links.push({ "source": data.source[i], "target": data.target[i], "value": +data.value[i] }); | |
| }); | |
| //now get nodes based on links data | |
| //thanks Mike Bostock https://groups.google.com/d/msg/d3-js/pl297cFtIQk/Eso4q_eBu1IJ | |
| //this handy little function returns only the distinct / unique nodes | |
| nodes = d3.keys(d3.nest() | |
| .key(function (d) { return d.name; }) | |
| .map(nodes)); | |
| //it appears d3 with force layout wants a numeric source and target | |
| //so loop through each link replacing the text with its index from node | |
| links.forEach(function (d, i) { | |
| links[i].source = nodes.indexOf(links[i].source); | |
| links[i].target = nodes.indexOf(links[i].target); | |
| }); | |
| //now loop through each nodes to make nodes an array of objects rather than an array of strings | |
| nodes.forEach(function (d, i) { | |
| nodes[i] = { "name": d }; | |
| }); | |
| sankey | |
| .nodes(nodes) | |
| .links(links) | |
| .layout(params.layout); | |
| var link = svg.append("g").selectAll(".link") | |
| .data(links) | |
| .enter().append("path") | |
| .attr("class", "link") | |
| .attr("d", path) | |
| .style("stroke-width", function (d) { return Math.max(1, d.dy); }) | |
| .sort(function (a, b) { return b.dy - a.dy; }); | |
| link.append("title") | |
| .text(function (d) { return d.source.name + " → " + d.target.name + "\n" + format(d.value); }); | |
| var node = svg.append("g").selectAll(".node") | |
| .data(nodes) | |
| .enter().append("g") | |
| .attr("class", "node") | |
| .attr("transform", function (d) { return "translate(" + d.x + "," + d.y + ")"; }) | |
| .call(d3.behavior.drag() | |
| .origin(function (d) { return d; }) | |
| .on("dragstart", function () { this.parentNode.appendChild(this); }) | |
| .on("drag", dragmove)); | |
| node.append("rect") | |
| .attr("height", function (d) { return d.dy; }) | |
| .attr("width", sankey.nodeWidth()) | |
| .style("fill", function (d) { return d.color = color(d.name.replace(/ .*/, "")); }) | |
| .style("stroke", function (d) { return d3.rgb(d.color).darker(2); }) | |
| .append("title") | |
| .text(function (d) { return d.name + "\n" + format(d.value); }); | |
| node.append("text") | |
| .attr("x", -6) | |
| .attr("y", function (d) { return d.dy / 2; }) | |
| .attr("dy", ".35em") | |
| .attr("text-anchor", "end") | |
| .attr("transform", null) | |
| .text(function (d) { return d.name; }) | |
| .filter(function (d) { return d.x < params.width / 2; }) | |
| .attr("x", 6 + sankey.nodeWidth()) | |
| .attr("text-anchor", "start"); | |
| // the function for moving the nodes | |
| function dragmove(d) { | |
| d3.select(this).attr("transform", | |
| "translate(" + ( | |
| d.x = Math.max(0, Math.min(params.width - d.dx, d3.event.x)) | |
| ) + "," + ( | |
| d.y = Math.max(0, Math.min(params.height - d.dy, d3.event.y)) | |
| ) + ")"); | |
| sankey.relayout(); | |
| link.attr("d", path); | |
| } | |
| })(); | |
| </script> | |
| <script> | |
| // to be specific in case you have more than one chart | |
| d3.selectAll('#chart21541f297cdc svg path.link') | |
| .style('stroke', function(d){ | |
| //here we will use the source color | |
| //if you want target then sub target for source | |
| //or if you want something other than gray | |
| //supply a constant | |
| //or use a categorical scale or gradient | |
| return d.source.color; | |
| }) | |
| //note no changes were made to opacity | |
| //to do uncomment below but will affect mouseover | |
| //so will need to define mouseover and mouseout | |
| //happy to show how to do this also | |
| // .style('stroke-opacity', .7) | |
| </script> | |
| </body> | |
| </html> |
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