{"id":4523,"date":"2025-12-31T21:16:00","date_gmt":"2025-12-31T12:16:00","guid":{"rendered":"https:\/\/best-biostatistics.com\/toukei-er\/?p=4523"},"modified":"2026-01-01T09:50:06","modified_gmt":"2026-01-01T00:50:06","slug":"introduction-to-network-analysis-with-igraph-in-r-from-data-preparation-to-visualization-tips","status":"publish","type":"post","link":"https:\/\/best-biostatistics.com\/toukei-er\/entry\/introduction-to-network-analysis-with-igraph-in-r-from-data-preparation-to-visualization-tips\/","title":{"rendered":"R\u306eigraph\u3067\u59cb\u3081\u308b\uff01\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5206\u6790\u5165\u9580\uff1a\u30c7\u30fc\u30bf\u306e\u6e96\u5099\u304b\u3089\u53ef\u8996\u5316\u306e\u30b3\u30c4\u307e\u3067"},"content":{"rendered":"\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>SNS\u306e\u3064\u306a\u304c\u308a\u3001\u4ed5\u4e8b\u306e\u4eba\u9593\u95a2\u4fc2\u3001\u5358\u8a9e\u306e\u7d50\u3073\u3064\u304d\u306a\u3069\u3001\u8907\u96d1\u306a\u95a2\u4fc2\u6027\u3092\u76ee\u306b\u898b\u3048\u308b\u5f62\u306b\u3057\u305f\u3044\u3068\u8003\u3048\u305f\u3053\u3068\u306f\u306a\u3044\u3060\u308d\u3046\u304b\u3002<\/p>\n\n\n\n<p>\u305d\u3093\u306a\u6642\u3001R\u8a00\u8a9e\u3067\u6700\u3082\u983c\u308a\u306b\u306a\u308b\u306e\u304c<strong>igraph<\/strong>\u30d1\u30c3\u30b1\u30fc\u30b8\u3067\u3042\u308b\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001R\u3092\u4f7f\u3044\u59cb\u3081\u305f\u3070\u304b\u308a\u306e\u8aad\u8005\u306b\u5411\u3051\u3066\u3001igraph\u306e\u57fa\u672c\u304b\u3089\u3001\u5c11\u3057\u9ad8\u5ea6\u306a\u300c\u30b0\u30eb\u30fc\u30d7\u5206\u3051\u300d\u3084\u300c\u91cd\u8981\u5ea6\u306e\u53ef\u8996\u5316\u300d\u307e\u3067\u3092\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u3067\u89e3\u8aac\u3059\u308b\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">igraph\u3068\u306f\uff1f<\/h2>\n\n\n\n<p><code>igraph<\/code>\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08\u30b0\u30e9\u30d5\uff09\u3092\u6271\u3046\u305f\u3081\u306e\u4e16\u754c\u7684\u306b\u6709\u540d\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3042\u308b\u3002R\u3060\u3051\u3067\u306a\u304fPython\u3084C\u8a00\u8a9e\u3067\u3082\u5229\u7528\u3055\u308c\u3066\u304a\u308a\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u3092\u6301\u3064\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9ad8\u901f:<\/strong> \u6570\u4e07\u4ef6\u306e\u30c7\u30fc\u30bf\u3082\u4e00\u77ac\u3067\u51e6\u7406\u304c\u53ef\u80fd\u3002<\/li>\n\n\n\n<li><strong>\u591a\u6a5f\u80fd:<\/strong> \u5358\u306a\u308b\u63cf\u753b\u306b\u3068\u3069\u307e\u3089\u305a\u3001\u7d71\u8a08\u7684\u306a\u5206\u6790\u30e1\u30cb\u30e5\u30fc\u304c\u6975\u3081\u3066\u8c4a\u5bcc\u3002<\/li>\n\n\n\n<li><strong>\u6a19\u6e96\u7684:<\/strong> \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5206\u6790\u306e\u8ad6\u6587\u3084\u30d3\u30b8\u30cd\u30b9\u30ec\u30dd\u30fc\u30c8\u3067\u6700\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u30c4\u30fc\u30eb\u306e\u4e00\u3064\u3067\u3042\u308b\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u56f3\u306e\u57fa\u672c\uff1a\u70b9\uff08\u30ce\u30fc\u30c9\uff09\u3068\u7dda\uff08\u30a8\u30c3\u30b8\uff09<\/h2>\n\n\n\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u56f3\u306f\u3001\u4e3b\u306b2\u3064\u306e\u8981\u7d20\u3067\u69cb\u6210\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30ce\u30fc\u30c9\uff08Node \/ Vertex\uff09\uff1a<\/strong> \u5206\u6790\u3057\u305f\u3044\u5bfe\u8c61\uff08\u4eba\u3001\u30e2\u30ce\u3001\u5834\u6240\u306a\u3069\uff09\u3002<\/li>\n\n\n\n<li><strong>\u30a8\u30c3\u30b8\uff08Edge\uff09\uff1a<\/strong> \u5bfe\u8c61\u540c\u58eb\u306e\u3064\u306a\u304c\u308a\uff08\u53cb\u4eba\u95a2\u4fc2\u3001\u53d6\u5f15\u3001\u30ea\u30f3\u30af\u306a\u3069\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div id=\"biost-3990137618\" class=\"biost- biost-entity-placement\"><p style=\"text-align: center;\"><span style=\"font-size: 20px;\"><strong><a href=\"https:\/\/best-biostatistics.com\/kmhl\">\uff1e\uff1e\u3082\u3046\u7d71\u8a08\u3067\u60a9\u3080\u306e\u306f\u7d42\u308f\u308a\u306b\u3057\u307e\u305b\u3093\u304b\uff1f\u00a0<\/a><\/strong><\/span><\/p>\r\n<a href=\"https:\/\/best-biostatistics.com\/kmhl\"><img class=\"aligncenter wp-image-2794 size-full\" src=\"https:\/\/best-biostatistics.com\/wp\/wp-content\/uploads\/2023\/11\/bn_r_03.png\" alt=\"\" width=\"500\" height=\"327\" \/><\/a>\r\n<p style=\"text-align: center;\"><span style=\"color: #ff0000; font-size: 20px;\"><strong><span class=\"marker2\">\u21911\u4e07\u4eba\u4ee5\u4e0a\u306e\u533b\u7642\u5f93\u4e8b\u8005\u304c\u8cfc\u8aad\u4e2d<\/span><\/strong><\/span><\/p><\/div><h2 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u306e\u6e96\u5099\uff1a\u3069\u3093\u306a\u5f62\u306b\u3059\u308c\u3070\u3044\u3044\uff1f<\/h2>\n\n\n\n<p>igraph\u3067\u56f3\u3092\u63cf\u304f\u306b\u306f\u3001<span class=\"swl-marker mark_orange\">\u300c\u8ab0\u3068\u8ab0\u304c\u3064\u306a\u304c\u3063\u3066\u3044\u308b\u304b\u300d<\/span>\u3068\u3044\u30462\u5217\u306e\u30ea\u30b9\u30c8\uff08\u30a8\u30c3\u30b8\u30ea\u30b9\u30c8\uff09\u3092\u7528\u610f\u3059\u308b\u306e\u304c\u6700\u3082\u52b9\u7387\u7684\u3067\u3042\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\nif (!require(igraph)) install.packages(\"igraph\")\nlibrary(igraph)\n\n# \u4f8b\uff1aA\u3055\u3093\u3068B\u3055\u3093\u304c\u3064\u306a\u304c\u3063\u3066\u3044\u308b\u3001\u3068\u3044\u3046\u30ea\u30b9\u30c8\nedges &lt;- data.frame(\n  from = c(\"A\", \"A\", \"B\", \"C\", \"D\", \"E\", \"F\"),\n  to   = c(\"B\", \"C\", \"C\", \"D\", \"E\", \"A\", \"A\")\n)\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u57fa\u672c\u306e\u63cf\u753b\uff1a\u307e\u305a\u306f\u63cf\u3044\u3066\u307f\u308b<\/h2>\n\n\n\n<p>\u7528\u610f\u3057\u305f\u30c7\u30fc\u30bf\u3092\u3001igraph\u5c02\u7528\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5f62\u5f0f\u306b\u5909\u63db\u3057\u3066\u30d7\u30ed\u30c3\u30c8\u3059\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># 1. \u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u3092\u30b0\u30e9\u30d5\u5f62\u5f0f\u306b\u5909\u63db\ng &lt;- graph_from_data_frame(edges, directed = FALSE)\n\n# 2. \u63cf\u753b\nplot(g)\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"963\" height=\"709\" src=\"https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-15.png\" alt=\"\" class=\"wp-image-4524\" srcset=\"https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-15.png 963w, https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-15-300x221.png 300w, https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-15-768x565.png 768w\" sizes=\"(max-width: 963px) 100vw, 963px\" \/><\/figure>\n\n\n\n<p>\u3053\u308c\u3060\u3051\u3067\u3082\u56f3\u306f\u51fa\u529b\u3055\u308c\u308b\u304c\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u307e\u307e\u3067\u306f\u8996\u899a\u7684\u306a\u60c5\u5831\u304c\u4e4f\u3057\u3044\u3002\u3053\u3053\u304b\u3089\u304c\u5206\u6790\u306e\u918d\u9190\u5473\u3067\u3042\u308b\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u3010\u5fdc\u7528\u3011\u30b0\u30eb\u30fc\u30d7\uff08\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\uff09\u3092\u898b\u5206\u3051\u308b<\/h2>\n\n\n\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u4e2d\u306b\u306f\u3001\u300c\u4ef2\u826f\u3057\u30b0\u30eb\u30fc\u30d7\u300d\u306e\u3088\u3046\u306a\u307e\u3068\u307e\u308a\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u3053\u308c\u3092\u81ea\u52d5\u3067\u898b\u3064\u3051\u308b\u624b\u6cd5\u3092<strong>\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u691c\u51fa<\/strong>\u3068\u547c\u3076\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b0\u30eb\u30fc\u30d7\u306f\u3069\u3046\u3084\u3063\u3066\u6c7a\u307e\u308b\uff1f<\/h3>\n\n\n\n<p>\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c\u3001<span class=\"swl-marker mark_orange\">\u300c\u5185\u5074\u306e\u3064\u306a\u304c\u308a\u304c\u6fc3\u304f\u3001\u5916\u5074\u3078\u306e\u3064\u306a\u304c\u308a\u304c\u8584\u3044\u300d<\/span>\u90e8\u5206\u3092\u7279\u5b9a\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u81a8\u5927\u306a\u30c7\u30fc\u30bf\u306e\u4e2d\u304b\u3089\u3001\u73fe\u5b9f\u306e\u30b5\u30fc\u30af\u30eb\u3084\u90e8\u7f72\u306b\u76f8\u5f53\u3059\u308b\u96c6\u56e3\u3092\u6d6e\u304d\u5f6b\u308a\u306b\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u691c\u51fa\uff08Walktrap\u6cd5\uff09\u3092\u5b9f\u884c\ncommunity &lt;- cluster_walktrap(g)\n\n# \u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306b\u8272\u3092\u5272\u308a\u5f53\u3066\nV(g)$color &lt;- community$membership\n\nplot(g, main = \"\u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306b\u8272\u5206\u3051\u3057\u305f\u56f3\")\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"963\" height=\"709\" src=\"https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-16.png\" alt=\"\" class=\"wp-image-4525\" srcset=\"https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-16.png 963w, https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-16-300x221.png 300w, https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-16-768x565.png 768w\" sizes=\"(max-width: 963px) 100vw, 963px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u3010\u5fdc\u7528\u3011\u91cd\u8981\u4eba\u7269\uff08\u30cf\u30d6\uff09\u3092\u5927\u304d\u304f\u3059\u308b<\/h2>\n\n\n\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u300c\u5f71\u97ff\u529b\u304c\u5f37\u3044\u30ce\u30fc\u30c9\u300d\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3042\u308b\u3002\u3053\u308c\u306b\u306f<span class=\"swl-marker mark_orange\">\u4e2d\u5fc3\u6027\uff08Centrality\uff09<\/span>\u3068\u3044\u3046\u6307\u6a19\u3092\u7528\u3044\u308b\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6b21\u6570\u4e2d\u5fc3\u6027:<\/strong> \u3069\u308c\u3060\u3051\u591a\u304f\u306e\u7dda\u304c\u96c6\u307e\u3063\u3066\u3044\u308b\u304b\uff08\uff1d\u9854\u304c\u5e83\u3044\u304b\uff09\u3092\u793a\u3059\u6307\u6a19\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code># \u3064\u306a\u304c\u308a\u306e\u6570\uff08\u6b21\u6570\u4e2d\u5fc3\u6027\uff09\u3092\u8a08\u7b97\ncentrality &lt;- degree(g)\n\n# \u3064\u306a\u304c\u308a\u304c\u591a\u3044\u307b\u3069\u30ce\u30fc\u30c9\u3092\u5927\u304d\u304f\u3057\u3066\u63cf\u753b\nplot(g, vertex.size = centrality * 10, main = \"\u91cd\u8981\u5ea6\u3067\u30b5\u30a4\u30ba\u3092\u5909\u66f4\u3057\u305f\u56f3\")\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"963\" height=\"709\" src=\"https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-17.png\" alt=\"\" class=\"wp-image-4526\" srcset=\"https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-17.png 963w, https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-17-300x221.png 300w, https:\/\/best-biostatistics.com\/toukei-er\/wp-content\/uploads\/2025\/12\/image-17-768x565.png 768w\" sizes=\"(max-width: 963px) 100vw, 963px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">igraph\u306e\u5229\u70b9\u30fb\u9650\u754c\u30fb\u4f7f\u3044\u6240<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>\u9805\u76ee<\/strong><\/td><td><strong>\u7279\u5fb4<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>\u5229\u70b9<\/strong><\/td><td>\u51e6\u7406\u304c\u975e\u5e38\u306b\u9ad8\u901f\u3002\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u691c\u51fa\u3084\u4e2d\u5fc3\u6027\u8a08\u7b97\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c\u5145\u5b9f\u3057\u3066\u3044\u308b\u3002<\/td><\/tr><tr><td><strong>\u9650\u754c<\/strong><\/td><td>\u6a19\u6e96\u306e\u56f3\u306f\u300c\u9759\u6b62\u753b\u300d\u3067\u3042\u308b\u3002\u30de\u30a6\u30b9\u64cd\u4f5c\u3067\u52d5\u304b\u305b\u308b\u56f3\u3092\u4f5c\u308a\u305f\u3044\u5834\u5408\u306f<code>networkD3<\/code>\u306a\u3069\u304c\u9069\u3057\u3066\u3044\u308b\u3002<\/td><\/tr><tr><td><strong>\u4f7f\u3044\u6240<\/strong><\/td><td>\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u3092\u5b66\u8853\u7684\u30fb\u8ad6\u7406\u7684\u306b\u5206\u6790\u3057\u305f\u3044\u6642\u3084\u3001\u51fa\u7248\u30fb\u5831\u544a\u7528\u306e\u9ad8\u54c1\u8cea\u306a\u56f3\u3092\u4f5c\u6210\u3057\u305f\u3044\u6642\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<p>R\u306e<code>igraph<\/code>\u3092\u4f7f\u3048\u3070\u3001\u4e00\u898b\u30d0\u30e9\u30d0\u30e9\u306b\u898b\u3048\u308b\u30c7\u30fc\u30bf\u304b\u3089\u300c\u96a0\u308c\u305f\u30b0\u30eb\u30fc\u30d7\u300d\u3084\u300c\u30ad\u30fc\u30de\u30f3\u300d\u3092\u53ef\u8996\u5316\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3042\u308b\u3002<\/p>\n\n\n\n<ol start=\"1\" 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