//determine which two data keys from the census we should show
constvisualizationKeys=
vizTopic=="beforecovid vs aftercovid"
?["",""]
:["",""];
differenceYScale=d3
.scaleLinear()
.domain([-1,1])
.range([chartHeight-margin,margin])
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.