FileAttachment("image.png").image()characterization = {
const config = {
height: 520,
width: 960,
units: unitSelection.unit,
label: `${unitSelection.unit === "IP" ? "kBTU/ft²/yr": "kWh/m²/yr"}`
};
const svg = d3.select(DOM.svg(config.width, config.height));
const graph = sankey(sankey_data);
const nodeWidth = graph.nodes[0].x1 - graph.nodes[0].x0;
const node = svg.selectAll("g")
.data(graph.nodes)
.enter().append("g")
.attr('transform', d => `translate(${d.x0}, ${d.y0})`);
node.append("rect")
.attr("height", d => d.y1 - d.y0)
.attr("width", d => d.x1 - d.x0)
.attr("fill", d => color(d.name))
.attr("display", d => d.name === "Nothing" ? "none" : null)
.attr("stroke", "#000")
.append("title")
.html(d => `${d.name}\n${si_to(d.value)} ${config.label}`);
node.append("text")
.style("font", "10px sans-serif")
.attr("x", d => d.x0 < config.width / 2 ? 6 + (d.x1 - d.x0) : - 6)
.attr("y", d => (d.y1 - d.y0) / 2)
.attr("dy", "0.35em")
.attr("text-anchor", d => d.x0 < config.width / 2 ? "start" : "end")
.attr('font-size', 10)
.html(d => d.name);
node.append("text")
.style("font", "12px sans-serif")
.attr("x", d => d.x0 < config.width / 2 ? 6 + (d.x1 - d.x0) : - 6)
.attr("y", d => (d.y1 - d.y0) / 2)
.attr("dy", d => {
// switch(d.name) {
// case "Heating Load":
// return "-1.25em";
// default:
// return "1.85em";
// }
return "1.8em";
})
.attr("text-anchor", d => d.x0 < config.width / 2 ? "start" : "end")
.style("font-weight", "bold")
.html(d => {
switch(d.name) {
case "Natural Gas":
return `EUI: ${_.round(si_to(d.value), 0)} ${config.label}`;
case "Electricity":
return `EUI: ${_.round(si_to(d.value), 0)} ${config.label}`;
case "District Heating":
return `EUI: ${_.round(si_to(d.value), 0)} ${config.label}`;
case "District Cooling":
return `EUI: ${_.round(si_to(d.value), 0)} ${config.label}`;
default:
return "";
}
});
node.attr('cursor', 'move')
.call(d3.drag()
.on('start', dragStart)
.on('drag', dragMove)
.on('end', dragEnd));
const link = svg.append("g")
.attr("fill", "none")
.attr("stroke-opacity", 0.5)
.selectAll("g")
.data(graph.links)
.enter().append("g")
.style("mix-blend-mode", "multiply")
.attr("id", d => d.source.name.replace(" ", "_") + "_" + d.target.name.replace(" ", "_"));
//apply gradients based on input and output
const gradient = link.append("linearGradient")
.attr("id", d => (d.uid = DOM.uid("link")).id)
.attr("gradientUnits", "userSpaceOnUse")
.attr("x1", d => d.source.x1)
.attr("x2", d => d.target.x0);
gradient.append("stop")
.attr("offset", "0%")
.attr("stop-color", d => color(d.source.name));
gradient.append("stop")
.attr("offset", "100%")
.attr("stop-color", d => color(d.target.name));
link.append("path")
.attr("class", "link")
.attr("d", d3.sankeyLinkHorizontal())
.attr("stroke", d => d.uid)
.attr("display", d=> d.target.name === "Nothing" ? "none": null)
.attr("opacity", d => d.value < 0.02 ? 0 : 1)
.attr("stroke-width", d => Math.max(1, d.width));
//link.append("title")
//.html(d => `${d.source.name} → ${d.target.name}\n${si_to(d.value)} ${config.label}`);
function dragStart (d) {
if (!d.__x) d.__x = d3.event.x;
if (!d.__y) d.__y = d3.event.y;
if (!d.__x0) d.__x0 = d.x0;
if (!d.__y0) d.__y0 = d.y0;
if (!d.__x1) d.__x1 = d.x1;
if (!d.__y1) d.__y1 = d.y1;
}
function dragMove(d) {
d3.select(this)
.attr('transform', function (d) {
const dx = d3.event.x - d.__x;
const dy = d3.event.y - d.__y;
d.x0 = d.__x0 + dx;
d.x1 = d.__x1 + dx;
d.y0 = d.__y0 + dy;
d.y1 = d.__y1 + dy;
if (d.x0 < 0) {
d.x0 = 0;
d.x1 = nodeWidth;
}
if (d.x1 > config.width) {
d.x0 = config.width - nodeWidth;
d.x1 = config.width;
}
if (d.y0 < 0) {
d.y0 = 0;
d.y1 = d.__y1 - d.__y0;
}
if (d.y1 > config.height) {
d.y0 = config.height - (d.__y1 - d.__y0);
d.y1 = config.height;
}
return `translate(${d.x0}, ${d.y0})`;
});
sankey.update(graph);
link.selectAll(".link").attr('d', d3.sankeyLinkHorizontal());
}
function dragEnd(d) {
delete d.__x;
delete d.__y;
delete d.__x0;
delete d.__x1;
delete d.__y0;
delete d.__y1;
}
return svg.node();
}
ip_to = d => (unitSelection.unit === "SI") ? _.round(d / 3.412 / 0.092903, 2) : _.round(d, 2);
si_to = d => (unitSelection.unit === "IP") ? _.round(d * 3.412 * 0.092903, 2) : _.round(d, 2);
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.
