Published
Edited
Sep 13, 2020
10 stars
25 Apr 2020: First Bar Chart26 Apr 2020: Bar Chart Revisited27 Apr 2020: Finalising the Bar Chart28 Apr 2020: What Else I Learned From That Bar Chart29 Apr 2020: Setting up Observable30 Apr 2020: What Else Can I Do With This Bar Chart?1 May 2020: Formatting Numbers and Sorting a Bar Chart2 May 2020: Exploring More of Observable and Vega-Lite3 May 2020: Exploring More Vega-Lite4 May 2020: Vega-Lite Scatterplot and Heat Map, and More Posts on Getting Started With Data Viz5 May 2020: Vega-Lite Scatterplot continued6 May 2020: D3 Scatterplot7 May 2020: D3 Scatterplot with Legends8 May 2020: D3 Scatterplot with Tooltips9 May 2020: D3 Scatterplot with Voronoi Tooltips10 May 2020: Line charts11 May 2020: Vega-Lite Line Charts12 May 2020: D3 Line Chart13 May 2020: D3 Multi-Line Chart14 May 2020: D3 Multi-Line Chart with Annotations15 May 2020: D3 Multi-Line Chart with Shading16 May 2020: Donut Charts and Pie Charts17 May 2020: Pie Charts in Vega-Lite18 May 2020: Donut Chart in Vega-Lite19 May 2020: Donut Chart in D320 May 2020: Donut Chart in D3 with Footnotes21 May 2020: Donut Chart in D3 with Tooltips22 May 2020: Area Charts, Stacked Area Charts, Stream graphs and Ridgelines23 May 2020: Area Charts in Vega-Lite and CSV Parsing24 May 2020: Area Charts in D3 with Tooltips25 May 2020: Cumulative Area Chart in D3 with Tooltips26 May 2020: Histograms and Density Plots27 May 2020: Exploratory Histogram28 May 2020: D3 Histogram29 May 2020: D3 Histogram Styling30 May 2020: Data Tables31 May 2020: Wikipedia Data Tables1 June 2020: Wrangling Wikipedia List Data and Summary Statistics2 June 2020: Treemaps, Dendrograms, Sunbursts, Circle Packing, and Tree Diagrams3 June 2020: D3 Tree Diagram and D3 Hierarchy4 June 2020: D3 Clustered Dendrogram5 June 2020: D3 Radial Tidy Tree and Radial Dendrogram6 June 2020: D3 Collapsible Tidy Tree7 June 2020: D3 Collapsible Tidy Tree (Improved)8 June 2020: Designing for Touch Devices: Drag, Click, Hover, Focus, Scroll, Zoom, Delaunay, Voronoi9 June 2020: Designing for Small Screens: Responsive Data Viz, Resizing, and Aspect Ratios10 June 2020: Typography for Data Viz11 June 2020: Color in Data Viz12 June 2020: Styled Bar Chart13 June 2020: Accessible Bar Chart and Accessible Data Table14 June 2020: Line Chart with Points and Bar Chart15 June 2020: Network Diagrams16 June 2020: D3 Disjoint Force-Directed Graph17 June 2020: D3 Bar Chart with Textured Line18 June 2020: D3 Bar Chart Transitions19 June 2020: D3 Bar Chart Transitions (Improved)20 June 2020: Sketchy D3 Bar Chart Style21 June 2020: Brushing to Filter and Zoom Using D3 Brush22 June 2020: D3 Bar Chart Brush (Work In Progress)23 June 2020: Linear Regression24 June 2020: Hatched Pattern Effect Bar Chart25 June 2020: Checkerboard Fill Effect Bar Chart26 June 2020: D3 Bar Chart Brush27 June 2020: Using Textures28 June 2020: Charting Typing Speed: Data and Exploration29 June 2020: Charting Typing Speed: Data and Exploration with Vega-Lite30 June 2020: Charting Typing Speed: Data and Exploration with Vega-Lite and Datawrapper1 July 2020: Charting Typing Speed: Data and Exploration with Vega-Lite Bubble Chart2 July 2020: Charting Typing Scores: Data and Exploration with Vega-Lite3 July 2020: Journal Updates and User Testing4 July 2020: About Heatmaps5 July 2020: Data Wrangling for a Heatmap6 July 2020: D3 Heatmap Without Sorting7 July 2020: D3 Heatmap With Sorting8 July 2020: D3 Heatmap with Legend9 July 2020: D3 Heatmap Styled10 July 2020: About Bubble Charts11 July 2020: D3 Bubble Chart12 July 2020: D3 Bubble Chart with Labels on Hover13 July 2020: D3 Bubble Chart with Voronoi Labels on Hover14 July 2020: D3 Bubble Chart with Voronoi Tooltips15 July 2020: About Population Pyramids16 July 2020: Data Wrangling for Population Pyramids17 July 2020: D3 Population Pyramid18 July 2020: About Sankey, Alluvial, Parallel Sets, and Parallel Coordinates19 July 2020: Data Wrangling for a Sankey Diagram20 July 2020: D3 Sankey Diagram21 July 2020: D3 Sankey Diagram with Hovers and Percentages22 July 2020: D3 Parallel Coordinates23 July 2020: D3 Parallel Coordinates (Updates)24 July 2020: About Slope Charts25 July 2020: Data Wrangling for a Slope Chart26 July 2020: D3 Slope Chart27 July 2020: D3 Slope Chart with Color28 July 2020: D3 Slope Chart with Highlight Color and Gray Context Lines29 July 2020: D3 Slope Chart Small Multiples (Work in Progress)31 July 2020: About Dumbbell or Connected Dot Plots1 August 2020: D3 Dumbbell Plot2 August 2020: 100 Days of Data VizAbout TimelinesBuilding TimelinesAbout SparklinesAbout Circle PackingD3 Circle PackingD3 Circle Packing with Data Wrangling and Interactive GroupingSort by arbitrary arrayAbout Choropleth MapsAbout Map Data: GeoJSON and TopoJSON with D3
30 July 2020: D3 Slope Chart Small Multiples
function slopeChart(multipleData, index) {
const chartSpace = d3.select(this);
const n = multipleData.visits.length;
const x = d3.scalePoint()
.domain(d3.range(n))
.range([params.multiples.margin, params.multiples.width - params.multiples.margin]);
const y = d3.scaleLinear()
.domain(sharedYExtent)
.range([params.multiples.height - params.multiples.margin, params.multiples.margin]);
const line = d3.line()
.x((d, i) => x(i))
.y(y);
const plots = chartSpace.append('g')
.selectAll('g')
.data([multipleData])
.join('g')
plots
.append("g")
.attr("class", "axis axis--left")
.attr("transform", `translate(${params.multiples.margin}, ${0})`)
.call(d3.axisLeft(y)
.tickSizeOuter(0).tickSizeInner(0)
)
.call(g => g.selectAll(".tick").remove())
.call(g => g.selectAll("path.domain").attr("stroke", "#DFDFDF"));
plots
.append("g")
.attr("class", "axis axis--right")
.attr("transform", `translate(${params.multiples.width - params.multiples.margin}, ${0})`)
.call(d3.axisRight(y)
.tickSizeOuter(0).tickSizeInner(0)
)
.call(g => g.selectAll(".tick").remove())
.call(g => g.selectAll("path.domain").attr("stroke", "#DFDFDF"));
plots.append("g")
.attr("class", "context-slopes")
.selectAll("path")
.data(data)
.join("path")
.attr("class", "slope")
.attr("d", d => line(d.visits))
.attr("fill", "none")
.attr("fill-opacity", 0.5)
.attr("stroke-linecap", "butt")
.attr("stroke", "#DFDFDF")
.attr("stroke-width", 0.5);
plots.append('path')
.attr("class", "slope")
.attr("d", d => line(d.visits))
.attr("fill", "none")
.attr("fill-opacity", 0.5)
.attr("stroke-linecap", "butt")
.attr("stroke", "#4EA376")
.attr("stroke-width", 1);
const gCircles = plots.append("g")
.attr("class", "data-points")
gCircles.append("g").attr("transform", "translate(0,2)")
.append("text")
.attr("x", d => x(1) + 4)
.attr("y", d => y(d.visits[1]))
.attr("dy", "0.35em")
.attr("text-anchor", "start")
.style("font-size", 9)
.attr("opacity", d => index === 0 ? 1 : 0)
.attr("aria-hidden", d => index === 0 ? "false" : "true")
.text(d => d.visits[1] + " visits");
gCircles.append("circle")
.attr("class", "dot")
.attr("fill","#4EA376")
.attr("cx", d => x(0))
.attr("cy", d => y(d.visits[0]))
.attr("r", 2)
.clone(true)
.attr("class", "dot")
.attr("cx", d => x(1))
.attr("cy", d => y(d.visits[1]));
plots.append("text")
.attr("class", "cat-name")
.attr("x", params.multiples.width / 2)
.attr("y", params.multiples.height)
.attr("dy", "1.5em")
.attr("text-anchor", "middle")
.style("font-size", 9)
.text(d => d.name.length > 6 ? d.name.slice(0,5) + "…" : d.name);
}
function translate(d, i) {
return `translate(
${(params.multiples.width + params.multiples.margin) * (2 * (i % params.multiples.columns) + 1)},
${(params.multiples.height + params.multiples.margin) * ((2 * Math.floor(i / params.multiples.columns)) + 1)}
)`;
}
mutable params = {
let output = {};
output["svg"] = {
"width": 954,
"height": 400
};
output["margin"] = {
"top": 0,
"right": 24,
"bottom": 72,
"left": 24
};
output["multiples"] = {
"margin": 8,
"width": (output["svg"]["height"] / 10),
"height": 50,
"columns": 9
};
output["plot"] = {
"x": output["margin"]["left"],
"y": output["margin"]["top"],
"width": output["svg"]["width"] - output["margin"]["left"] - output["margin"]["right"],
"height": output["svg"]["height"] - output["margin"]["top"] - output["margin"]["bottom"]
};
return output;
}
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