The avatar for @emfielduva
Eric Field
Building and Using Tools to See. UVA Architecture + Data Science. IT Director. Instructor.
Public
Edited
Apr 25, 2023
2 forks
misc
getting values from inputsGet nearest data neighborsPolygons by [lon,lat] sets on Map (geo)Filter data on array of multiple valuesgeoContainsFilled Arc Polygon BandsAdd text labels to Fixed location Network GraphScale Date / Time on a lineForce Directed clustering along a pathD3 join, with updating dataSVG distance along path / curveCurves / distance color gradient"Thickened" line with SVG filled BezierTitle from Variable Dropdown
Mousover change text
Stacked dropdown filter
Also listed in…
Interface and dynamics
Insert cell
Insert cell
<svg width="600" height="300">
<g id="layer1"></g>
<text id="mytext" x="100" y="250"></text>

<style>
#mytext {font-family: Arial,Helvetica,sans-serif; font-size: 30px; fill: red;}
</style>
</svg>
Insert cell
Insert cell
data = [
{name: "one", value: 1},
{name: "two", value: 2},
{name: "three", value: 3},
{name: "four", value: 4},
{name: "five", value: 5}
]
Insert cell
viz.select("#layer1").selectAll(".mycircle")
.data(data)
.join("circle")
.classed("mycircle", true)
.attr("cx",d => d.value * 100)
.attr("cy", 150)
.attr("r", d => d.value * 10)
.style("fill","steelblue")
.on("mouseover", putText) // this is the critical part, calling the putText function below
Insert cell
putText = (evt,d) => {
viz.select("#mytext").text("this item is: " + d.name);
}
Insert cell
Insert cell
Insert cell

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.
Learn more