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UX Improvements

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Brennan Wilkes (Text Groove) 2026-02-09 22:16:56 -08:00
parent 23dbd34006
commit 340f81aa65
1 changed files with 32 additions and 4 deletions
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36
viz/app/item_page.js
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@ -47,6 +47,31 @@ function isBcStoreLabel(label) {
return false; return false;
} }
function weightedMeanByDuration(pointsMap, sortedDates) {
// pointsMap: Map(dateStr -> number|null)
// sortedDates: ["YYYY-MM-DD", ...] sorted asc
let wsum = 0;
let wtot = 0;
for (let i = 0; i < sortedDates.length; i++) {
const d0 = sortedDates[i];
const v = pointsMap.get(d0);
if (!Number.isFinite(v)) continue;
const t0 = Date.parse(d0 + "T00:00:00Z");
const d1 = sortedDates[i + 1];
const t1 = d1 ? Date.parse(d1 + "T00:00:00Z") : t0 + 24 * 3600 * 1000;
// weight in days (min 1 day)
const w = Math.max(1, Math.round((t1 - t0) / (24 * 3600 * 1000)));
wsum += v * w;
wtot += w;
}
return wtot ? wsum / wtot : null;
}
function meanFinite(arr) { function meanFinite(arr) {
if (!Array.isArray(arr)) return null; if (!Array.isArray(arr)) return null;
let sum = 0, let sum = 0,
@ -879,8 +904,11 @@ export async function renderItem($app, skuInput) {
// --- Compute marker values --- // --- Compute marker values ---
// Province medians: per-store mean over time, then median across stores (>=3 stores) // Province medians: per-store mean over time, then median across stores (>=3 stores)
const storeMeans = seriesSorted const storeMeans = seriesSorted
.map((s) => ({ label: s.label, mean: meanFinite(s.values) })) .map((s) => ({
.filter((x) => Number.isFinite(x.mean)); label: s.label,
mean: weightedMeanByDuration(s.points, labels), // duration-weighted
}))
.filter((x) => Number.isFinite(x.mean));
const bcMeans = storeMeans.filter((x) => isBcStoreLabel(x.label)); const bcMeans = storeMeans.filter((x) => isBcStoreLabel(x.label));
const abMeans = storeMeans.filter((x) => !isBcStoreLabel(x.label)); const abMeans = storeMeans.filter((x) => !isBcStoreLabel(x.label));
@ -889,12 +917,12 @@ export async function renderItem($app, skuInput) {
if (bcMeans.length >= 3) { if (bcMeans.length >= 3) {
const y = medianFinite(bcMeans.map((x) => x.mean)); const y = medianFinite(bcMeans.map((x) => x.mean));
if (Number.isFinite(y)) markers.push({ y: Math.round(y), text: "BC Median" }); if (Number.isFinite(y)) markers.push({ y: Math.round(y), text: "BC" });
} }
if (abMeans.length >= 3) { if (abMeans.length >= 3) {
const y = medianFinite(abMeans.map((x) => x.mean)); const y = medianFinite(abMeans.map((x) => x.mean));
if (Number.isFinite(y)) markers.push({ y: Math.round(y), text: "AB Median" }); if (Number.isFinite(y)) markers.push({ y: Math.round(y), text: "Alberta" });
} }
// Target price: pick 3 lowest per-store mins (distinct stores), then average (>=3 stores) // Target price: pick 3 lowest per-store mins (distinct stores), then average (>=3 stores)