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UVA Architecture + Data Science. IT Director. Instructor.
import {powerplants_2019} from "@emfielduva/dvlib_sampledata"
powerplants_2019
benchmark = powerplants_2019.find(d => d["Plant name"] == "North Anna")
findDataNeighbors = (data,benchmarkElement,compareField,countAboveBelow,sortType) => {
if (!sortType) {sortType = d3.descending}
let toNum = (text) => Number(text.replace(/,/g,''))
let sortedData = d3.sort(data, (a,b) => sortType(toNum(a[compareField]),toNum(b[compareField])));
let benchmarkIndex = sortedData.indexOf(benchmarkElement);
let countAbove, countBelow;
if (benchmarkIndex < countAboveBelow) { // this element is close to the beginning, shift count positions.
let leftover = countAboveBelow - benchmarkIndex;
countAbove = countAboveBelow + leftover;
countBelow = benchmarkIndex;
} else if (benchmarkIndex > data.length - countAboveBelow) { // this element is close to the end, shift count positions
let leftover = data.length - benchmarkIndex;
countAbove = leftover;
countBelow = countAboveBelow + leftover;
} else {
countAbove = countBelow = countAboveBelow;
}
return sortedData.slice(benchmarkIndex-countAbove,benchmarkIndex+countAbove);
}
neighbors = findDataNeighbors(powerplants_2019,benchmark,"Plant annual net generation (MWh)",5,d3.descending)
neighbors
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