https://pizza.rs/tags/weighted_avg/Recent content in Weighted_avg on INFINI PizzaHugoenhttps://pizza.rs/docs/references/aggregation/metric/weighted-avg/Mon, 01 Jan 0001 00:00:00 +0000https://pizza.rs/docs/references/aggregation/metric/weighted-avg/<h1 id="weighted-average-aggregation"> Weighted average aggregation <a class="anchor" href="#weighted-average-aggregation">#</a> </h1> <p>A single-value metrics aggregation that computes the weighted average of numeric values. Each document contributes <code>value × weight</code>, divided by the total weight — e.g. an average price weighted by quantity sold. When documents are not all equally important, <a href="https://pizza.rs/docs/references/aggregation/metric/avg/"><code>avg</code></a> is the wrong tool and this is the right one.</p> <h2 id="how-it-works"> How it works <a class="anchor" href="#how-it-works">#</a> </h2> <p>The engine walks the matching documents once, accumulating <code>Σ(value × weight)</code> in the numerator and <code>Σ weight</code> in the denominator; the result is their quotient. Both sides are computed in the same pass over two columns, so the pairing of a document&rsquo;s value with its own weight is never lost.</p>