{"id":10126,"date":"2025-01-28T13:50:59","date_gmt":"2025-01-28T04:50:59","guid":{"rendered":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/?p=10126"},"modified":"2025-01-28T17:49:56","modified_gmt":"2025-01-28T08:49:56","slug":"matplotlib-%e3%81%a7%e5%8d%98%e6%8c%af%e3%82%8a%e5%ad%90%e3%81%ae%e6%8c%af%e5%b9%85%e3%81%ae%e7%b5%b5%e3%82%92%e6%8f%8f%e3%81%8f","status":"publish","type":"post","link":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/10126\/","title":{"rendered":"Matplotlib \u3067\u5358\u632f\u308a\u5b50\u306e\u632f\u5e45\u306e\u7d75\u3092\u63cf\u304f"},"content":{"rendered":"<p><!--more--><\/p>\n<div class=\"cell border-box-sizing text_cell rendered\">\n<div class=\"prompt input_prompt\"><\/div>\n<div class=\"inner_cell\">\n<div class=\"text_cell_render border-box-sizing rendered_html\">\n<h3 id=\"\u30e9\u30a4\u30d6\u30e9\u30ea\u306e-import\">\u30e9\u30a4\u30d6\u30e9\u30ea\u306e import<\/h3>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"cell border-box-sizing code_cell rendered\">\n<div class=\"input\">\n<div class=\"prompt input_prompt\">In\u00a0[1]:<\/div>\n<div class=\"inner_cell\">\n<div class=\"input_area\">\n<div class=\" highlight hl-ipython3\">\n<pre><span class=\"kn\">import<\/span> <span class=\"nn\">numpy<\/span> <span class=\"k\">as<\/span> <span class=\"nn\">np<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">matplotlib.pyplot<\/span> <span class=\"k\">as<\/span> <span class=\"nn\">plt<\/span>\r\n\r\n<span class=\"kn\">from<\/span> <span class=\"nn\">matplotlib.patches<\/span> <span class=\"kn\">import<\/span> <span class=\"o\">*<\/span>\r\n\r\n<span class=\"c1\"># \u4ee5\u4e0b\u306f\u30b0\u30e9\u30d5\u3092 SVG \u3067 Notebook \u306b\u30a4\u30f3\u30e9\u30a4\u30f3\u8868\u793a\u3055\u305b\u308b\u8a2d\u5b9a<\/span>\r\n<span class=\"o\">%<\/span><span class=\"k\">config<\/span> InlineBackend.figure_formats = ['svg']\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"cell border-box-sizing code_cell rendered\">\n<div class=\"input\">\n<div class=\"prompt input_prompt\">In\u00a0[2]:<\/div>\n<div class=\"inner_cell\">\n<div class=\"input_area\">\n<div class=\" highlight hl-ipython3\">\n<pre><span class=\"c1\"># ax \u3092\u4f7f\u3046\u969b\u306e\u6700\u521d\u306e\u304a\u307e\u3058\u306a\u3044<\/span>\r\n<span class=\"n\">fig<\/span><span class=\"p\">,<\/span> <span class=\"n\">ax<\/span> <span class=\"o\">=<\/span> <span class=\"n\">plt<\/span><span class=\"o\">.<\/span><span class=\"n\">subplots<\/span><span class=\"p\">(<\/span><span class=\"n\">figsize<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mf\">6.4<\/span><span class=\"p\">,<\/span> <span class=\"mf\">6.4<\/span><span class=\"p\">])<\/span>\r\n\r\n<span class=\"c1\"># \u30a2\u30b9\u30da\u30af\u30c8\u3092 equal \u306b<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">set_aspect<\/span><span class=\"p\">(<\/span><span class=\"s1\">'equal'<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\"># ticks \u306f\u3064\u3051\u306a\u3044<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">set_xticks<\/span><span class=\"p\">([])<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">set_yticks<\/span><span class=\"p\">([])<\/span>\r\n\r\n<span class=\"c1\"># \u8868\u793a\u7bc4\u56f2<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">axis<\/span><span class=\"p\">([<\/span><span class=\"o\">-<\/span><span class=\"mf\">2.5<\/span><span class=\"p\">,<\/span> <span class=\"mf\">2.5<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">])<\/span>\r\n\r\n<span class=\"c1\"># x\u8ef8 y\u8ef8\u306f dashed \u306b\u3002<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">axhline<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"n\">c<\/span><span class=\"o\">=<\/span><span class=\"s1\">'gray'<\/span><span class=\"p\">,<\/span> <span class=\"n\">ls<\/span><span class=\"o\">=<\/span><span class=\"s1\">'--'<\/span><span class=\"p\">,<\/span> <span class=\"n\">lw<\/span><span class=\"o\">=<\/span><span class=\"mf\">0.5<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">axvline<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"n\">c<\/span><span class=\"o\">=<\/span><span class=\"s1\">'gray'<\/span><span class=\"p\">,<\/span> <span class=\"n\">ls<\/span><span class=\"o\">=<\/span><span class=\"s1\">'--'<\/span><span class=\"p\">,<\/span> <span class=\"n\">lw<\/span><span class=\"o\">=<\/span><span class=\"mf\">0.5<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\"># 30\u5ea6\u306b\u632f\u308c\u305f\u5358\u632f\u308a\u5b50<\/span>\r\n<span class=\"n\">th<\/span> <span class=\"o\">=<\/span> <span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">radians<\/span><span class=\"p\">(<\/span><span class=\"mi\">30<\/span><span class=\"p\">)<\/span>\r\n<span class=\"c1\"># \u30ef\u30a4\u30e4\u30fc\u306e\u9577\u3055<\/span>\r\n<span class=\"n\">ell<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">3<\/span>\r\n\r\n<span class=\"c1\"># \u30ef\u30a4\u30e4\u30fc<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">plot<\/span><span class=\"p\">([<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span>  <span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">sin<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> <span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">cos<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> <span class=\"n\">color<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'k'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">plot<\/span><span class=\"p\">([<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">sin<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> <span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">cos<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> <span class=\"n\">color<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'k'<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\"># \u304a\u3082\u308a<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">scatter<\/span><span class=\"p\">([<\/span> <span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">sin<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> <span class=\"p\">[<\/span><span class=\"o\">-<\/span><span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">cos<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> <span class=\"n\">color<\/span><span class=\"o\">=<\/span><span class=\"s1\">'red'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">scatter<\/span><span class=\"p\">([<\/span><span class=\"o\">-<\/span><span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">sin<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> <span class=\"p\">[<\/span><span class=\"o\">-<\/span><span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">cos<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> <span class=\"n\">color<\/span><span class=\"o\">=<\/span><span class=\"s1\">'red'<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\"># \u304a\u3082\u308a\u306e\u8ecc\u8de1\u306e\u5186\u5f27<\/span>\r\n<span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Arc<\/span><span class=\"p\">((<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">),<\/span> <span class=\"mi\">6<\/span><span class=\"p\">,<\/span> <span class=\"mi\">6<\/span><span class=\"p\">,<\/span> <span class=\"n\">theta1<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">240<\/span><span class=\"p\">,<\/span> <span class=\"n\">theta2<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">300<\/span><span class=\"p\">,<\/span> \r\n        <span class=\"n\">color<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'k'<\/span><span class=\"p\">,<\/span> <span class=\"n\">lw<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">0.5<\/span><span class=\"p\">,<\/span><span class=\"n\">ls<\/span><span class=\"o\">=<\/span><span class=\"s1\">'--'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">add_patch<\/span><span class=\"p\">(<\/span><span class=\"n\">p<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\"># \u5186\u5f27\u3067\u89d2\u5ea6<\/span>\r\n<span class=\"c1\"># (1)<\/span>\r\n<span class=\"n\">p<\/span><span class=\"o\">=<\/span><span class=\"n\">Arc<\/span><span class=\"p\">((<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">),<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"n\">theta1<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">270<\/span><span class=\"p\">,<\/span> <span class=\"n\">theta2<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">300<\/span><span class=\"p\">,<\/span> \r\n        <span class=\"n\">color<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'b'<\/span><span class=\"p\">,<\/span> <span class=\"n\">lw<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">1.5<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">add_patch<\/span><span class=\"p\">(<\/span><span class=\"n\">p<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">text<\/span><span class=\"p\">(<\/span><span class=\"mf\">0.15<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"mf\">0.63<\/span><span class=\"p\">,<\/span> <span class=\"s1\">'(1)'<\/span><span class=\"p\">,<\/span> <span class=\"n\">color<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'b'<\/span><span class=\"p\">,<\/span> <span class=\"n\">ha<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'center'<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\"># (2)<\/span>\r\n<span class=\"n\">p<\/span><span class=\"o\">=<\/span><span class=\"n\">Arc<\/span><span class=\"p\">((<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">),<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"n\">theta1<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">240<\/span><span class=\"p\">,<\/span> <span class=\"n\">theta2<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">300<\/span><span class=\"p\">,<\/span> \r\n        <span class=\"n\">color<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'red'<\/span><span class=\"p\">,<\/span> <span class=\"n\">lw<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">1.5<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">add_patch<\/span><span class=\"p\">(<\/span><span class=\"n\">p<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">text<\/span><span class=\"p\">(<\/span><span class=\"mf\">0.1<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"mf\">1.15<\/span><span class=\"p\">,<\/span> <span class=\"s1\">'(2)'<\/span><span class=\"p\">,<\/span> <span class=\"n\">color<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'red'<\/span><span class=\"p\">,<\/span> <span class=\"n\">ha<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'center'<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\"># \u76f4\u7dda\u3067\u6c34\u5e73\u8ddd\u96e2<\/span>\r\n<span class=\"c1\"># (3)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">plot<\/span><span class=\"p\">([<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">sin<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> \r\n        <span class=\"p\">[<\/span><span class=\"o\">-<\/span><span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">cos<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">),<\/span> <span class=\"o\">-<\/span><span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">cos<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> <span class=\"n\">c<\/span><span class=\"o\">=<\/span><span class=\"s1\">'tab:blue'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">text<\/span><span class=\"p\">(<\/span><span class=\"mf\">0.6<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"mf\">2.55<\/span><span class=\"p\">,<\/span> <span class=\"s1\">'(3)'<\/span><span class=\"p\">,<\/span> <span class=\"n\">c<\/span><span class=\"o\">=<\/span><span class=\"s1\">'tab:blue'<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\"># (4)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">plot<\/span><span class=\"p\">([<\/span><span class=\"o\">-<\/span><span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">sin<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">),<\/span> <span class=\"n\">ell<\/span><span class=\"o\">*<\/span><span class=\"n\">np<\/span><span class=\"o\">.<\/span><span class=\"n\">sin<\/span><span class=\"p\">(<\/span><span class=\"n\">th<\/span><span class=\"p\">)],<\/span> \r\n        <span class=\"p\">[<\/span><span class=\"o\">-<\/span><span class=\"mf\">2.63<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"mf\">2.63<\/span><span class=\"p\">],<\/span> <span class=\"n\">c<\/span><span class=\"o\">=<\/span><span class=\"s1\">'tab:orange'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">text<\/span><span class=\"p\">(<\/span><span class=\"o\">-<\/span><span class=\"mf\">0.25<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"mf\">2.8<\/span><span class=\"p\">,<\/span> <span class=\"s1\">'(4)'<\/span><span class=\"p\">,<\/span> <span class=\"n\">c<\/span><span class=\"o\">=<\/span><span class=\"s1\">'tab:orange'<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\"># \u30bf\u30a4\u30c8\u30eb<\/span>\r\n<span class=\"n\">ax<\/span><span class=\"o\">.<\/span><span class=\"n\">set_title<\/span><span class=\"p\">(<\/span><span class=\"s1\">'\u5358\u632f\u308a\u5b50\u306e\u300c\u632f\u5e45\u300d\u306f\u3069\u308c\uff1f'<\/span><span class=\"p\">);<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"output_wrapper\">\n<div class=\"output\">\n<div class=\"output_area\">\n<div class=\"prompt\"><\/div>\n<div class=\"output_svg output_subarea \">\n<p><!--?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?--><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-10127\" src=\"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-content\/uploads\/sites\/76\/furiko-shinpuku.svg\" alt=\"\" width=\"640\" height=\"640\" \/><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"cell border-box-sizing text_cell rendered\">\n<div class=\"prompt input_prompt\"><\/div>\n<div class=\"inner_cell\">\n<div class=\"text_cell_render border-box-sizing rendered_html\">\n<p><span style=\"font-family: helvetica, arial, sans-serif;\"><strong>\u554f\u984c<\/strong><\/span>\uff1a\u5358\u632f\u308a\u5b50\u306e\u300c<span style=\"font-family: helvetica, arial, sans-serif;\"><strong>\u632f\u5e45<\/strong><\/span>\u300d\u306f\u6b21\u306e\u3046\u3061\u306e\u3069\u308c\uff1f<\/p>\n<ul>\n<li>(1) \u306e\u89d2\u5ea6\uff0c\u3059\u306a\u308f\u3061\u925b\u76f4\u4e0b\u5411\u304d\u3092\u30bc\u30ed\u3068\u3057\u305f\u3068\u304d\u306e\u632f\u308c\u89d2\u306e\u6700\u5927\u5024<\/li>\n<li>(2) \u306e\u89d2\u5ea6\uff0c\u3059\u306a\u308f\u3061 (1) \u306e\u89d2\u5ea6\u306e2\u500d<\/li>\n<li>(3) \u306e\u9577\u3055\uff0c\u3059\u306a\u308f\u3061\u632f\u308a\u5b50\u306e\u652f\u70b9\u304b\u3089\u306e\u6c34\u5e73\u65b9\u5411\u306e\u9577\u3055\u306e\u6700\u5927\u5024<\/li>\n<li>(4) \u306e\u9577\u3055\uff0c\u3059\u306a\u308f\u3061 (3) 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