| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="This module implements some math functions used for gradient boosting process."><meta name="keywords" content="rust, rustlang, rust-lang, fitness"><title>gbdt::fitness - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../gbdt/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../gbdt/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">Module fitness</a></h2><div class="sidebar-elems"><section><ul class="block"><li><a href="#functions">Functions</a></li></ul></section></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Module <a href="../index.html">gbdt</a>::<wbr><a class="mod" href="#">fitness</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../src/gbdt/fitness.rs.html#1-461">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>This module implements some math functions used for gradient boosting process.</p> |
| </div></details><h2 id="functions" class="small-section-header"><a href="#functions">Functions</a></h2><div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.AUC.html" title="gbdt::fitness::AUC fn">AUC</a></div><div class="item-right docblock-short">AUC (Area Under the Curve) calculation for first n element in data vector. |
| See <a href="https://en.wikipedia.org/wiki/Receiver_operating_characteristic#Area_under_the_curve">wikipedia</a> for detailed algorithm.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.MAE.html" title="gbdt::fitness::MAE fn">MAE</a></div><div class="item-right docblock-short">MAE (Mean Absolute Error) calculation for first n element in data vector. |
| See <a href="https://en.wikipedia.org/wiki/Mean_absolute_error">wikipedia</a> for detail for detailed algorithm.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.RMSE.html" title="gbdt::fitness::RMSE fn">RMSE</a></div><div class="item-right docblock-short">RMSE (Root-Mean-Square deviation) calculation for first n element in data vector. |
| See <a href="https://en.wikipedia.org/wiki/Root-mean-square_deviation">wikipedia</a> for detailed algorithm.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.almost_equal.html" title="gbdt::fitness::almost_equal fn">almost_equal</a></div><div class="item-right docblock-short">Comparing two number with default floating error threshold.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.almost_equal_thrs.html" title="gbdt::fitness::almost_equal_thrs fn">almost_equal_thrs</a></div><div class="item-right docblock-short">Comparing two number with a costomized floating error threshold.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.average.html" title="gbdt::fitness::average fn">average</a></div><div class="item-right docblock-short">Return the weighted target average for first n data in data vector.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.label_average.html" title="gbdt::fitness::label_average fn">label_average</a></div><div class="item-right docblock-short">Return the weighted label average for first n data in data vector.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.lad_loss.html" title="gbdt::fitness::lad_loss fn">lad_loss</a></div><div class="item-right docblock-short">LAD loss function.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.lad_loss_gradient.html" title="gbdt::fitness::lad_loss_gradient fn">lad_loss_gradient</a></div><div class="item-right docblock-short">LAD gradient calculation.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.logit.html" title="gbdt::fitness::logit fn">logit</a></div><div class="item-right docblock-short">Logistic value function.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.logit_loss.html" title="gbdt::fitness::logit_loss fn">logit_loss</a></div><div class="item-right docblock-short">Negative binomial log-likelyhood loss function.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.logit_loss_gradient.html" title="gbdt::fitness::logit_loss_gradient fn">logit_loss_gradient</a></div><div class="item-right docblock-short">Log-likelyhood gradient calculation.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.same.html" title="gbdt::fitness::same fn">same</a></div><div class="item-right docblock-short">Return whether the first n data in data vector have same target values.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.weighted_label_median.html" title="gbdt::fitness::weighted_label_median fn">weighted_label_median</a></div><div class="item-right docblock-short">Return the weighted label median for first n data in data vector.</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.weighted_residual_median.html" title="gbdt::fitness::weighted_residual_median fn">weighted_residual_median</a></div><div class="item-right docblock-short">Return the weighted residual median for first n data in data vector.</div></div></div></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="gbdt" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
