w-statistic
Version:
A tool for statistical analysis.
149 lines (108 loc) • 5.52 kB
HTML
<html lang="en">
<head>
<meta charset="utf-8">
<title>studentTInv.mjs - Documentation</title>
<script src="scripts/prettify/prettify.js"></script>
<script src="scripts/prettify/lang-css.js"></script>
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link type="text/css" rel="stylesheet" href="styles/prettify.css">
<link type="text/css" rel="stylesheet" href="styles/jsdoc.css">
<script src="scripts/nav.js" defer></script>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<input type="checkbox" id="nav-trigger" class="nav-trigger" />
<label for="nav-trigger" class="navicon-button x">
<div class="navicon"></div>
</label>
<label for="nav-trigger" class="overlay"></label>
<nav >
<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="w-statistic.html">w-statistic</a><ul class='methods'><li data-type='method'><a href="w-statistic.html#.arrAverage">arrAverage</a></li><li data-type='method'><a href="w-statistic.html#.arrAverageWithLogNormCI">arrAverageWithLogNormCI</a></li><li data-type='method'><a href="w-statistic.html#.arrAverageWithNormCI">arrAverageWithNormCI</a></li><li data-type='method'><a href="w-statistic.html#.arrCount">arrCount</a></li><li data-type='method'><a href="w-statistic.html#.arrGammaFit">arrGammaFit</a></li><li data-type='method'><a href="w-statistic.html#.arrGammaHist">arrGammaHist</a></li><li data-type='method'><a href="w-statistic.html#.arrGammaInv">arrGammaInv</a></li><li data-type='method'><a href="w-statistic.html#.arrGeometricAverage">arrGeometricAverage</a></li><li data-type='method'><a href="w-statistic.html#.arrGeometricStd">arrGeometricStd</a></li><li data-type='method'><a href="w-statistic.html#.arrLogNormHist">arrLogNormHist</a></li><li data-type='method'><a href="w-statistic.html#.arrLogNormInv">arrLogNormInv</a></li><li data-type='method'><a href="w-statistic.html#.arrMovingAverage">arrMovingAverage</a></li><li data-type='method'><a href="w-statistic.html#.arrNormHist">arrNormHist</a></li><li data-type='method'><a href="w-statistic.html#.arrNormInv">arrNormInv</a></li><li data-type='method'><a href="w-statistic.html#.arrQuartile">arrQuartile</a></li><li data-type='method'><a href="w-statistic.html#.arrStd">arrStd</a></li><li data-type='method'><a href="w-statistic.html#.bin">bin</a></li><li data-type='method'><a href="w-statistic.html#.histGen">histGen</a></li><li data-type='method'><a href="w-statistic.html#.regLine">regLine</a></li><li data-type='method'><a href="w-statistic.html#.regMpLine">regMpLine</a></li><li data-type='method'><a href="w-statistic.html#.regPoly">regPoly</a></li><li data-type='method'><a href="w-statistic.html#.regPower">regPower</a></li><li data-type='method'><a href="w-statistic.html#.sampleRandom">sampleRandom</a></li><li data-type='method'><a href="w-statistic.html#.studentTInv">studentTInv</a></li></ul></li></ul>
</nav>
<div id="main">
<h1 class="page-title">studentTInv.mjs</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>
import ispint from 'wsemi/src/ispint.mjs'
import isnum from 'wsemi/src/isnum.mjs'
import cint from 'wsemi/src/cint.mjs'
import cdbl from 'wsemi/src/cdbl.mjs'
import jt from './jStat.mjs'
/**
* 基於Student-T累加分布計算指定位置之反函數值
*
* Unit Test: {@link https://github.com/yuda-lyu/w-statistic/blob/master/test/studentTInv.test.js Github}
* @memberOf w-statistic
* @param {Number} n 輸入樣本數整數，需大於0
* @param {Number} p 輸入信賴水準浮點數，需介於0至1之間
* @returns {Number} 回傳反函數值
* @example
*
* async function test() {
*
* console.log(await studentTInv(35, 0.95))
* // => 1.6909241978049958
*
* console.log(await studentTInv(35, 0.5))
* // => -0
*
* console.log(await studentTInv(35, 0.05))
* // => -1.6909241978049974
*
* console.log(await studentTInv(15, 0.95))
* // => 1.7613101151015698
*
* }
* test()
* .catch((err) => {
* console.log(err)
* })
*
*/
async function studentTInv(n, p) {
//check n
if (!ispint(n)) {
return Promise.reject(`n[${n}] is not positive integer`)
}
n = cint(n)
if (n <= 1) {
return Promise.reject(`n[${n}] <= 1`)
}
// console.log('n', n)
//check p
if (!isnum(p)) {
p = 0.95
}
p = cdbl(p)
if (p < 0) {
return Promise.reject(`p[${p}] < 0`)
}
if (p > 1) {
return Promise.reject(`p[${p}] > 1`)
}
//degrees of freedom為自由度, 為樣本數n-1
let df = n - 1
// //r, 等同於Excel的r=T.INV(p,df)
// let studentt = await wd.Studentt(df)
// let r = studentt.inv(p)
let r = jt.studentt.inv(p, df)
return r
}
export default studentTInv
</code></pre>
</article>
</section>
</div>
<br class="clear">
<footer>
Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 4.0.2</a> on Tue Jul 29 2025 14:21:18 GMT+0800 (台北標準時間) using the <a href="https://github.com/clenemt/docdash">docdash</a> theme.
</footer>
<script>prettyPrint();</script>
<script src="scripts/polyfill.js"></script>
<script src="scripts/linenumber.js"></script>
</body>
</html>