63 lines
1.4 KiB
Markdown
63 lines
1.4 KiB
Markdown
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---
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title: Averages-Root mean square
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id: 594da033de4190850b893874
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challengeType: 5
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videoUrl: ''
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localeTitle: 平均值 - 均方根
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---
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## Description
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<section id="description"><p>计算数字1到10（包括1和10）的<a href="https://en.wikipedia.org/wiki/Root mean square" title="wp：均方根">均方根</a> 。 </p><p>均方根也以其首字母RMS（或rms）和二次均值来表示。 </p><p> RMS计算为数字平方的平均值，平方根： </p><p> <big>$$ x _ {\ mathrm {rms}} = \ sqrt {{{x_1} ^ 2 + {x_2} ^ 2 + \ cdots + {x_n} ^ 2} \ over n}。 $$</big> </p></section>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>rms</code>是一个功能。
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testString: 'assert(typeof rms === "function", "<code>rms</code> is a function.");'
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- text: '<code>rms([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])</code>应等于<code>6.2048368229954285</code> 。'
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testString: 'assert.equal(rms(arr1), answer1, "<code>rms([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])</code> should equal <code>6.2048368229954285</code>.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function rms (arr) {
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// Good luck!
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}
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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console.info('after the test');
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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