The avatar for @emfielduva
Eric Field
Building and Using Tools to See. UVA Architecture + Data Science. IT Director. Instructor.
Published
the Basics
Edited
Mar 1, 2022
5 forks
the Basics
Intro to Observable, HTML, and SVGSVG Object Types and attributesSVG Stacked Bar GraphDrawing Objects Procedurally
D3 baby steps
D3 element templatesthe Data in D3D3 Dynamics baby stepsD3 join, with updating data
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names = ["Eric","Vinay","Chase","Lucy"]
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numbers = [1,2,3,4,5,6,7]
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<svg width="800" height="200"></svg>
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mySVG = d3.select(svgObject)
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mySVG.selectAll("rect")
.data(numbers)
.join("rect")
.attr("width", d => d * 5) // given d (the data element from numbers) give me back d times 5
.attr("height",d => d * 5)
.attr("x", d => d * spacing)
.attr("y", 50)
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spacing = 50 // this is just a variable to illustrate that we can use it in the code above and below.
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mySVG.selectAll("text")
.data(names)
.join("text")
.text(d => d)
.attr("y", 40)
.attr("x", (d,i) => i * spacing + spacing)
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One platform to build and deploy the best data apps

Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.
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