计算标准差

Question

挑战

给定一个数字列表，计算该列表的总体标准差。

使用以下公式计算总体标准差：

输入

输入将以任何格式(列表、字符串等)列出整数。下面是一些例子：

56,54,89,87
67,54,86,67

数字将永远是整数。

输入将是STDIN或函数参数。

输出

输出必须是浮点数。

规则

您可以使用内置函数来查找标准偏差。

您的答案既可以是完整的程序，也可以是函数。

示例

10035, 436844, 42463, 44774 => 175656.78441352615

45,67,32,98,11,3 => 32.530327730015607

1,1,1,1,1,1 => 0.0

赢

最短的程序或功能获胜。

主板

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body{text-align:left!important}#answer-list,#language-list{padding:10px;width:290px;float:left}table thead{font-weight:700}table td{padding:5px}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <link rel="stylesheet" type="text/css" href="//cdn.sstatic.net/codegolf/all.css?v=83c949450c8b"> <div id="answer-list"> <h2>Leaderboard</h2> <table class="answer-list"> <thead> <tr><td></td><td>Author</td><td>Language</td><td>Size</td></tr></thead> <tbody id="answers"> </tbody> </table> </div><div id="language-list"> <h2>Winners by Language</h2> <table class="language-list"> <thead> <tr><td>Language</td><td>User</td><td>Score</td></tr></thead> <tbody id="languages"> </tbody> </table> </div><table style="display: none"> <tbody id="answer-template"> <tr><td>{{PLACE}}</td><td>{{NAME}}</td><td>{{LANGUAGE}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table> <table style="display: none"> <tbody id="language-template"> <tr><td>{{LANGUAGE}}</td><td>{{NAME}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table>

Answer 1

夹，3

.sk

.s是标准偏差，k以{1,2,3}形式解析输入。

Answer 2

倍频程，14字节

g=@(a)std(a,1)

在意为上试一试。

Answer 3

kdb+，3字节

dev

其中一个APL脱扣器必须有一个内置的这一点。

测试运行

q)dev 56, 54, 89, 87
16.53028
q)f:dev
q)f 10035, 436844, 42463, 44774
175656.8
q)f 45,67,32,98,11,3
32.53033