{"id":958,"date":"2023-07-03T01:04:17","date_gmt":"2023-01-05T23:18:20","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/r%e3%81%a7%e6%a8%99%e6%ba%96%e5%81%8f%e5%b7%ae%e3%82%92%e8%a8%88%e7%ae%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f\/"},"modified":"2025-08-01T03:50:41","modified_gmt":"2025-07-31T18:50:41","slug":"r%e3%81%a7%e6%a8%99%e6%ba%96%e5%81%8f%e5%b7%ae%e3%82%92%e8%a8%88%e7%ae%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/r%e3%81%a7%e6%a8%99%e6%ba%96%e5%81%8f%e5%b7%ae%e3%82%92%e8%a8%88%e7%ae%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f\/","title":{"rendered":"R\u3067\u6a19\u6e96\u504f\u5dee\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u306f\uff1f"},"content":{"rendered":"<p>\u7d71\u8a08\u8a00\u8a9e\u3068\u3057\u3066\u3001R\u306f\u5024\u306e\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u308b\u305f\u3081\u306e\u6a19\u6e96\u95a2\u6570sd(\u2019 &#8216;)\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u3067\u306f\u3001\u6a19\u6e96\u504f\u5dee\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f (De wa, hy\u014djun henka to wa nandesu ka?)<\/h2>\n<ul class=\"post-ul\">\n<li>\u2018Standard deviation is the measure of the dispersion of the values\u2019.<\/li>\n<li>The higher the standard deviation, the wider the spread of values.<\/li>\n<li>The lower the standard deviation, the narrower the spread of values.<\/li>\n<li>In simple words the formula is defined as &#8211; Standard deviation is the square root of the \u2018variance\u2019.<\/li>\n<\/ul>\n<h2>\u6a19\u6e96\u504f\u5dee\u306e\u91cd\u8981\u6027<\/h2>\n<p>\u6a19\u6e96\u504f\u5dee\u306f\u7d71\u8a08\u5b66\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u4eba\u6c17\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u306a\u305c\u3067\u3057\u3087\u3046\u304b\uff1f\u305d\u306e\u4eba\u6c17\u3084\u91cd\u8981\u6027\u306e\u7406\u7531\u3092\u4ee5\u4e0b\u306b\u6319\u3052\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>Standard deviation converts the negative number to a positive number by squaring it.<\/li>\n<li>It shows the larger deviations so that you can particularly look over them.<\/li>\n<li>It shows the central tendency, which is a very useful function in the analysis.<\/li>\n<li>It has a major role to play in finance, business, analysis, and measurements.<\/li>\n<\/ul>\n<p>\u8a71\u984c\u306b\u5165\u308b\u524d\u306b\u3001\u3053\u306e\u5b9a\u7fa9\u3092\u5fc3\u306b\u7559\u3081\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n<p>\u5206\u6563\uff08\u3076\u3093\u3055\u3093\uff09- \u89b3\u6e2c\u5024\u3068\u671f\u5f85\u5024\u306e\u4e8c\u4e57\u5dee\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2>\u30ea\u30b9\u30c8\u5185\u306e\u5024\u306e\u6a19\u6e96\u504f\u5dee\u3092R\u3067\u6c42\u3081\u307e\u3059\u3002<\/h2>\n<p>\u3053\u306e\u65b9\u6cd5\u3067\u306f\u3001\u30ea\u30b9\u30c8\u300cx\u300d\u3092\u4f5c\u6210\u3057\u3001\u305d\u308c\u306b\u3044\u304f\u3064\u304b\u306e\u5024\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002\u305d\u3057\u3066\u3001\u305d\u306e\u30ea\u30b9\u30c8\u5185\u306e\u5024\u306e\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code> x <span class=\"token operator\">&lt;-<\/span> c<span class=\"token punctuation\">(<\/span><span class=\"token number\">34<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">56<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">87<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">65<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">34<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">56<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">89<\/span><span class=\"token punctuation\">)<\/span>    <span class=\"token comment\">#creates list 'x' with some values in it.<\/span>\r\n\r\n sd<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">#calculates the standard deviation of the values in the list 'x'<\/span>\r\n<\/code><\/pre>\n<p>\u51fa\u529b\u306f22.28175\u3067\u3059\u3002<\/p>\n<p>\u4eca\u3001\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u308b\u305f\u3081\u306b\u30ea\u30b9\u30c8\u300cy\u300d\u304b\u3089\u7279\u5b9a\u306e\u5024\u3092\u62bd\u51fa\u3057\u3066\u307f\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code> y <span class=\"token operator\">&lt;-<\/span> c<span class=\"token punctuation\">(<\/span><span class=\"token number\">34<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">65<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">78<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">96<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">56<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">78<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">54<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">57<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">89<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">#creates a list 'y' having some values<\/span>\r\n \r\ndata1 <span class=\"token operator\">&lt;-<\/span> y<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token comment\">#extract specific values using its Index<\/span>\r\n\r\nsd<span class=\"token punctuation\">(<\/span>data1<span class=\"token punctuation\">)<\/span> <span class=\"token comment\">#calculates the standard deviation for Indexed or extracted values from the list.<\/span>\r\n<\/code><\/pre>\n<p>\u51fa\u529b\uff1a23.28519<\/p>\n<hr \/>\n<h2>CSV\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u3055\u308c\u305f\u5024\u306e\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u308b\u3002<\/h2>\n<p>\u3053\u306e\u65b9\u6cd5\u3067\u306f\u3001CSV\u30d5\u30a1\u30a4\u30eb\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u3066\u3001\u305d\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u5024\u306eR\u306b\u304a\u3051\u308b\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>readfile <span class=\"token operator\">&lt;-<\/span> read.csv<span class=\"token punctuation\">(<\/span><span class=\"token string\">'testdata1.csv'<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">#reading a csv file<\/span>\r\n\r\ndata2 <span class=\"token operator\">&lt;-<\/span> readfile<span class=\"token operator\">$<\/span>Values      <span class=\"token comment\">#getting values stored in the header 'Values'<\/span>\r\n\r\nsd<span class=\"token punctuation\">(<\/span>data2<span class=\"token punctuation\">)<\/span>                              <span class=\"token comment\">#calculates the standard deviation  <\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a5cedaa94e2bdf7c3d00\/20-0.png\" alt=\"Standard Deviation In R\" \/><\/div>\n<p>\u51fa\u529b -\u300917.88624<\/p>\n<hr \/>\n<h2>\u9ad8\u3044\u6a19\u6e96\u504f\u5dee<\/h2>\n<p>\u4e00\u822c\u7684\u306b\u3001\u6a19\u6e96\u504f\u5dee\u304c\u4f4e\u3044\u5834\u5408\u306f\u5024\u306f\u5e73\u5747\u5024\u306b\u975e\u5e38\u306b\u8fd1\u304f\u306a\u308a\u3001\u6a19\u6e96\u504f\u5dee\u304c\u9ad8\u3044\u5834\u5408\u306f\u5024\u306f\u5e73\u5747\u5024\u304b\u3089\u5e83\u304c\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3053\u3068\u3092\u4f8b\u3092\u6319\u3052\u3066\u8aac\u660e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 (Kono koto o rei o agete setsumei suru koto ga dekimasu.)<\/p>\n<pre class=\"post-pre\"><code>x <span class=\"token operator\">&lt;-<\/span> c<span class=\"token punctuation\">(<\/span><span class=\"token number\">79<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">82<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">84<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">96<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">98<\/span><span class=\"token punctuation\">)<\/span>\r\nmean<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token operator\">-<\/span><span class=\"token operator\">-<\/span><span class=\"token operator\">-&gt;<\/span>  <span class=\"token number\">82.22222<\/span>\r\nsd<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token operator\">-<\/span><span class=\"token operator\">-<\/span><span class=\"token operator\">-&gt;<\/span>  <span class=\"token number\">10.58038<\/span>\r\n<\/code><\/pre>\n<p>R\u3092\u4f7f\u7528\u3057\u3066\u3053\u308c\u3089\u306e\u5024\u3092\u68d2\u30b0\u30e9\u30d5\u306b\u30d7\u30ed\u30c3\u30c8\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p>ggplot2\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u305f\u3081\u306b\u306f\u3001R\u30b9\u30bf\u30b8\u30aa\u3067\u3053\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u300cggplot2\u300d\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u305f\u3081\u306b\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u304f\u3060\u3055\u3044: install.packages(&#8220;ggplot2&#8221;)\u3002<\/p>\n<pre class=\"post-pre\"><code>library<span class=\"token punctuation\">(<\/span>ggplot2<span class=\"token punctuation\">)<\/span>\r\n\r\nvalues <span class=\"token operator\">&lt;-<\/span> data.frame<span class=\"token punctuation\">(<\/span>marks<span class=\"token operator\">=<\/span>c<span class=\"token punctuation\">(<\/span><span class=\"token number\">79<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">82<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">84<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">96<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">98<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> students<span class=\"token operator\">=<\/span>c<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\r\nhead<span class=\"token punctuation\">(<\/span>values<span class=\"token punctuation\">)<\/span>                  <span class=\"token comment\">#displayes the values<\/span>\r\n marks students\r\n<span class=\"token number\">1<\/span>    <span class=\"token number\">79<\/span>        <span class=\"token number\">0<\/span>\r\n<span class=\"token number\">2<\/span>    <span class=\"token number\">82<\/span>        <span class=\"token number\">1<\/span>\r\n<span class=\"token number\">3<\/span>    <span class=\"token number\">84<\/span>        <span class=\"token number\">2<\/span>\r\n<span class=\"token number\">4<\/span>    <span class=\"token number\">96<\/span>        <span class=\"token number\">3<\/span>\r\n<span class=\"token number\">5<\/span>    <span class=\"token number\">98<\/span>        <span class=\"token number\">4<\/span>\r\nx <span class=\"token operator\">&lt;-<\/span> ggplot<span class=\"token punctuation\">(<\/span>values<span class=\"token punctuation\">,<\/span> aes<span class=\"token punctuation\">(<\/span>x<span class=\"token operator\">=<\/span>marks<span class=\"token punctuation\">,<\/span> y<span class=\"token operator\">=<\/span>students<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">+<\/span>geom_bar<span class=\"token punctuation\">(<\/span>stat<span class=\"token operator\">=<\/span><span class=\"token string\">'identity'<\/span><span class=\"token punctuation\">)<\/span>\r\nx                             <span class=\"token comment\">#displays the plot<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a5cedaa94e2bdf7c3d00\/31-0.png\" alt=\"sd in r\" \/><\/div>\n<p>\u4e0a\u8a18\u306e\u7d50\u679c\u3067\u306f\u3001\u30c7\u30fc\u30bf\u306e\u307b\u3068\u3093\u3069\u304c\u5e73\u5747\u5024(79\u300182\u300184)\u306e\u5468\u56f2\u306b\u30af\u30e9\u30b9\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u3066\u304a\u308a\u3001\u6a19\u6e96\u504f\u5dee\u304c\u4f4e\u3044\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u9ad8\u6a19\u6e96\u504f\u5dee\u3092\u793a\u3059\u30a4\u30e9\u30b9\u30c8\u3002<\/p>\n<pre class=\"post-pre\"><code>y <span class=\"token operator\">&lt;-<\/span> c<span class=\"token punctuation\">(<\/span><span class=\"token number\">23<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">27<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">35<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">55<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">76<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">79<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">82<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">84<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">94<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">96<\/span><span class=\"token punctuation\">)<\/span>\r\nmean<span class=\"token punctuation\">(<\/span>y<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token operator\">-<\/span><span class=\"token operator\">-<\/span><span class=\"token operator\">-&gt;<\/span> <span class=\"token number\">61.90909<\/span>\r\nsd<span class=\"token punctuation\">(<\/span>y<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token operator\">-<\/span><span class=\"token operator\">-<\/span><span class=\"token operator\">-&gt;<\/span> <span class=\"token number\">28.45507<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u3001R\u306eggplot\u3067\u3053\u308c\u3089\u306e\u5024\u3092\u68d2\u30b0\u30e9\u30d5\u3068\u3057\u3066\u30d7\u30ed\u30c3\u30c8\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code>library<span class=\"token punctuation\">(<\/span>ggplot2<span class=\"token punctuation\">)<\/span>\r\n\r\nvalues <span class=\"token operator\">&lt;-<\/span> data.frame<span class=\"token punctuation\">(<\/span>marks<span class=\"token operator\">=<\/span>c<span class=\"token punctuation\">(<\/span><span class=\"token number\">23<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">27<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">35<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">55<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">76<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">79<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">82<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">84<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">94<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">96<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> students<span class=\"token operator\">=<\/span>c<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">6<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">7<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">8<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\r\nhead<span class=\"token punctuation\">(<\/span>values<span class=\"token punctuation\">)<\/span>                  <span class=\"token comment\">#displayes the values<\/span>\r\n  marks students\r\n<span class=\"token number\">1<\/span>    <span class=\"token number\">23<\/span>        <span class=\"token number\">0<\/span>\r\n<span class=\"token number\">2<\/span>    <span class=\"token number\">27<\/span>        <span class=\"token number\">1<\/span>\r\n<span class=\"token number\">3<\/span>    <span class=\"token number\">30<\/span>        <span class=\"token number\">2<\/span>\r\n<span class=\"token number\">4<\/span>    <span class=\"token number\">35<\/span>        <span class=\"token number\">3<\/span>\r\n<span class=\"token number\">5<\/span>    <span class=\"token number\">55<\/span>        <span class=\"token number\">4<\/span>\r\n<span class=\"token number\">6<\/span>    <span class=\"token number\">76<\/span>        <span class=\"token number\">5<\/span>\r\nx <span class=\"token operator\">&lt;-<\/span> ggplot<span class=\"token punctuation\">(<\/span>values<span class=\"token punctuation\">,<\/span> aes<span class=\"token punctuation\">(<\/span>x<span class=\"token operator\">=<\/span>marks<span class=\"token punctuation\">,<\/span> y<span class=\"token operator\">=<\/span>students<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">+<\/span>geom_bar<span class=\"token punctuation\">(<\/span>stat<span class=\"token operator\">=<\/span><span class=\"token string\">'identity'<\/span><span class=\"token punctuation\">)<\/span>\r\nx                             <span class=\"token comment\">#displays the plot<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a5cedaa94e2bdf7c3d00\/37-0.png\" alt=\"sd in r \" \/><\/div>\n<p>\u4e0a\u8a18\u306e\u7d50\u679c\u3067\u306f\u3001\u5e83\u7bc4\u56f2\u306a\u30c7\u30fc\u30bf\u304c\u898b\u3089\u308c\u307e\u3059\u3002\u5e73\u5747\u70b961\u304b\u3089\u306f\u308b\u304b\u306b\u96e2\u308c\u305f\u6700\u4f4e\u70b923\u304c\u898b\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u9ad8\u3044\u6a19\u6e96\u504f\u5dee\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4eca\u307e\u3067\u306b\u3001R\u8a00\u8a9e\u306esd\uff08&#8217; &#8216;\uff09\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u6a19\u6e96\u504f\u5dee\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5341\u5206\u306b\u7406\u89e3\u304c\u3067\u304d\u305f\u3067\u3057\u3087\u3046\u3002\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u307e\u3068\u3081\u308b\u305f\u3081\u306b\u3001\u7c21\u5358\u306a\u554f\u984c\u3092\u89e3\u6c7a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u4f8b1\uff1a\u5076\u6570\u306e\u30ea\u30b9\u30c8\u306e\u6a19\u6e96\u504f\u5dee<\/h2>\n<p>\uff11\u304b\u3089\uff12\uff10\uff08\uff11\u3068\uff12\uff10\u306f\u9664\u304f\uff09\u306e\u5076\u6570\u306e\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u89e3\u6c7a\u7b56: 1\u304b\u308920\u307e\u3067\u306e\u5076\u6570\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<p>\uff12\u3001\uff14\u3001\uff16\u3001\uff18\u3001\uff11\uff10\u3001\uff11\uff12\u3001\uff11\uff14\u3001\uff11\uff16\u3001\uff11\uff18<\/p>\n<p>\u3053\u308c\u3089\u306e\u5024\u306e\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code>x <span class=\"token operator\">&lt;-<\/span> c<span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">6<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">8<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">14<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">18<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">#list of even numbers from 1 to 20<\/span>\r\n\r\nsd<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span>                           <span class=\"token comment\">#calculates the standard deviation of these <\/span>\r\n                            values <span class=\"token keyword\">in<\/span> the list of even numbers from <span class=\"token number\">1<\/span> to <span class=\"token number\">20<\/span>\r\n<\/code><\/pre>\n<p>\u51fa\u529b\u306f5.477226\u3067\u3059\u3002<\/p>\n<hr \/>\n<h2>\u4f8b\u3048\u3070\u3001\u30a2\u30e1\u30ea\u30ab\u306e\u4eba\u53e3\u30c7\u30fc\u30bf\u306e\u6a19\u6e96\u504f\u5dee\u3002<\/h2>\n<p>\u30a2\u30e1\u30ea\u30ab\u306e\u5dde\u3054\u3068\u306e\u4eba\u53e3\u306e\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u3053\u308c\u306b\u95a2\u3057\u3066\u306f\u3001CSV\u30d5\u30a1\u30a4\u30eb\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u3066\u5024\u3092\u8aad\u307f\u8fbc\u307f\u3001\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u3066R\u3067\u7d50\u679c\u3092\u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u306b\u30d7\u30ed\u30c3\u30c8\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>df<span class=\"token operator\">&lt;-<\/span>read.csv<span class=\"token punctuation\">(<\/span><span class=\"token string\">\"population.csv\"<\/span><span class=\"token punctuation\">)<\/span>      <span class=\"token comment\">#reads csv file<\/span>\r\ndata<span class=\"token operator\">&lt;-<\/span>df<span class=\"token operator\">$<\/span>X2018.Population           <span class=\"token comment\">#extarcts the data from population <\/span>\r\n                                     column\r\nmean<span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span>                          <span class=\"token comment\">#calculates the mean<\/span>\r\n                          \r\nView<span class=\"token punctuation\">(<\/span>df<span class=\"token punctuation\">)<\/span>                            <span class=\"token comment\">#displays the data<\/span>\r\nsd<span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span>                            <span class=\"token comment\">#calculates the standard deviation<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a5cedaa94e2bdf7c3d00\/52-0.png\" alt=\"standard deviation in r\" \/><\/div>\n<p>\u51fa\u529b &#8212;-&gt; \u5e73\u5747 = 6432008\u3001\u6a19\u6e96\u504f\u5dee = 7376752<\/p>\n<hr \/>\n<h2>\u7d50\u8ad6<\/h2>\n<p>R\u306e\u5024\u306e\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u308b\u306e\u306f\u7c21\u5358\u3067\u3059\u3002R\u306b\u306f\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u308b\u305f\u3081\u306esd(\u2019 &#8216;)\u3068\u3044\u3046\u6a19\u6e96\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u3002\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u308b\u305f\u3081\u306b\u306f\u3001\u5024\u306e\u30ea\u30b9\u30c8\u3092\u4f5c\u6210\u3059\u308b\u304b\u3001CSV\u30d5\u30a1\u30a4\u30eb\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u91cd\u8981\uff1a\u4e0a\u8a18\u306e\u3088\u3046\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3084\u30ea\u30b9\u30c8\u304b\u3089\u4e00\u90e8\u306e\u5024\u3092\u62bd\u51fa\u3057\u3001\u6a19\u6e96\u504f\u5dee\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u8cea\u554f\u7bb1\u3092\u4f7f\u7528\u3057\u3066\u3001R\u306esd\uff08&#8217; &#8216;\uff09\u95a2\u6570\u306b\u95a2\u3059\u308b\u7591\u554f\u3092\u6295\u7a3f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u697d\u3057\u3044\u5b66\u3073\u3092\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7d71\u8a08\u8a00\u8a9e\u3068\u3057\u3066\u3001R\u306f\u5024\u306e\u6a19\u6e96\u504f\u5dee\u3092\u6c42\u3081\u308b\u305f\u3081\u306e\u6a19\u6e96\u95a2\u6570sd(\u2019 &#8216;)\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002 \u3067\u306f\u3001\u6a19\u6e96\u504f\u5dee\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f (De wa, hy\u014djun henka to wa nandesu ka?) \u2018Stan [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-958","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast 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