{"id":7752,"date":"2024-02-25T13:36:12","date_gmt":"2024-02-25T04:36:12","guid":{"rendered":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/?p=7752"},"modified":"2024-02-26T10:17:43","modified_gmt":"2024-02-26T01:17:43","slug":"gnuplot-%e3%81%a7%e3%82%89%e3%81%9b%e3%82%93%e3%82%92%e7%ab%8b%e4%bd%93%e7%9a%84%e3%81%ab%e3%82%b0%e3%83%a9%e3%83%87%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3%e3%81%a7%e6%8f%8f%e3%81%8f","status":"publish","type":"post","link":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/7752\/","title":{"rendered":"gnuplot \u3067\u87ba\u65cb\uff08\u3089\u305b\u3093\uff09\u3092\u7acb\u4f53\u7684\u306b\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3\u3067\u63cf\u304f"},"content":{"rendered":"

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Jupyter Notebook \u3067\u306e\u30b0\u30e9\u30d5\u30b5\u30a4\u30ba\u8a2d\u5b9a<\/h3>\n

svg<\/code> \u3067\u30a4\u30f3\u30e9\u30a4\u30f3\u8868\u793a\uff0c\u30b0\u30e9\u30d5\u306e\u30b5\u30a4\u30ba\u3092 640 x 640<\/code> \u306b\uff0c\u30d5\u30a9\u30f3\u30c8\u30b5\u30a4\u30ba\u3092 14<\/code> \u306b\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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%gnu<\/span>plot<\/span> inline<\/span> svg<\/span> size<\/span> 640<\/span>,<\/span>640<\/span> fixed<\/span> enhanced<\/span> font<\/span> ',14'<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u95a2\u6570\u306e\u5b9a\u7fa9<\/h3>\n
\u3089\u305b\u3093\u8ecc\u9053\u3092\u3042\u3089\u308f\u3059 $x, y, z$ \u306f\u5a92\u4ecb\u5909\u6570\u8868\u793a\u3067<\/p>\n
\\begin{eqnarray}
\nx(u) &=& \\cos 2\\pi u \\\\
\ny(u) &=& \\sin 2\\pi u \\\\
\nz(u) &=& \\mbox{pitch} \\times u
\n\\end{eqnarray}<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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x<\/span>(u) =<\/span> cos<\/span>(<\/span>2<\/span>*<\/span>pi<\/span>*<\/span>u<\/span>)<\/span>\r\ny<\/span>(u) =<\/span> sin<\/span>(<\/span>2<\/span>*<\/span>pi<\/span>*<\/span>u<\/span>)<\/span>\r\nz<\/span>(u) =<\/span> pitch<\/span>*<\/span>u<\/span>\r\n\r\npitch<\/span> =<\/span> 0.01<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u4f8b<\/h3>\n<\/div>\n<\/div>\n<\/div>\n
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reset<\/span>\r\n# \u5ea7\u6a19\u8ef8\u306e\u76ee\u76db\u3092\u975e\u8868\u793a<\/span>\r\nunset<\/span> xtics<\/span>\r\nunset<\/span> ytics<\/span>\r\nunset<\/span> ztics<\/span>\r\nunset<\/span> border<\/span>\r\n\r\n# xy \u5e73\u9762\u306e\u4f4d\u7f6e<\/span>\r\nset<\/span> xyplane<\/span> 0<\/span>\r\n\r\n# xyz\u8ef8\u306e\u8868\u793a<\/span>\r\nset<\/span> zeroaxis<\/span>\r\n\r\n# x y \u306e\u8868\u793a\u7bc4\u56f2<\/span>\r\nset<\/span> xrange<\/span> [<\/span>-2<\/span>:<\/span>2<\/span>]<\/span>\r\nset<\/span> yrange<\/span> [<\/span>-2<\/span>:<\/span>2<\/span>]<\/span>\r\n\r\n# \u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u30ab\u30b9\u30bf\u30e0\u8a2d\u5b9a<\/span>\r\nset<\/span> palette<\/span> defined<\/span> (<\/span>0<\/span> \"dark-red\"<\/span> ,<\/span> 1<\/span> \"red\"<\/span> ,<\/span> 2<\/span> \"light-pink\"<\/span>)<\/span>\r\nunset<\/span> colorbox<\/span>\r\n\r\n# \u5a92\u4ecb\u5909\u6570\u8868\u793a\u3067<\/span>\r\nset<\/span> parametric<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\tdummy variable is t for curves, u\/v for surfaces\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3\u4ed8\u304d\u306e\u3089\u305b\u3093\u306e\u4f8b<\/h3>\n
\u524d\u5f8c\u95a2\u4fc2\u304c\u308f\u304b\u308b\u3088\u3046\u306b\uff0c\u624b\u524d\u3092 palette<\/code> \u3067\u6fc3\u3044\u3081\u306e\u8272\uff08dark-red<\/code>\uff09\uff0c\u5965\u3092\u8584\u76ee\u306e\u8272\uff08light-pink<\/code>\uff09\u306b\u3057\u3066\u3044\u308b\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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# \u66f2\u7dda\u3092\u6ed1\u3089\u304b\u306b<\/span>\r\nset<\/span> samples<\/span> 1000<\/span>\r\n# u \u306e\u7bc4\u56f2\uff0c20 \u5468<\/span>\r\nu0<\/span> =<\/span> 0<\/span>\r\nu1<\/span> =<\/span> 20<\/span>\r\nset<\/span> urange<\/span> [<\/span>u0<\/span>:<\/span>u1<\/span>]<\/span>\r\n\r\nsplot<\/span> '++'<\/span> using<\/span> (<\/span>x<\/span>(<\/span>u<\/span>))<\/span>:<\/span>(<\/span>y<\/span>(<\/span>u<\/span>))<\/span>:<\/span>(<\/span>z<\/span>(<\/span>u<\/span>))<\/span>:<\/span>(<\/span>y<\/span>(<\/span>u<\/span>))<\/span> \\\r\n           w<\/span> l<\/span> lw<\/span> 5<\/span> lc<\/span> palette<\/span> notitle<\/span><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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urange<\/code> \u306e\u5909\u66f4\u306b\u3088\u308b\u4e0d\u5177\u5408<\/h3>\n
urange<\/code> \u3092\u5c11\u3057\u5909\u3048\u305f\u3060\u3051\u306a\u306e\u306b\uff0c\u3069\u3053\u304c\u624b\u524d\u306a\u306e\u304b\uff0c\u308f\u3051\u308f\u304b\u3089\u3093\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u4e0d\u5177\u5408\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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# \u66f2\u7dda\u3092\u6ed1\u3089\u304b\u306b<\/span>\r\nset<\/span> samples<\/span> 1000<\/span>\r\n# u \u306e\u7bc4\u56f2<\/span>\r\nu0<\/span> =<\/span> -0<\/span>.25<\/span>\r\nu1<\/span> =<\/span> 20.25<\/span>\r\nset<\/span> urange<\/span> [<\/span>u0<\/span>:<\/span>u1<\/span>]<\/span>\r\n\r\nsplot<\/span> '++'<\/span> using<\/span> (<\/span>x<\/span>(<\/span>u<\/span>))<\/span>:<\/span>(<\/span>y<\/span>(<\/span>u<\/span>))<\/span>:<\/span>(<\/span>z<\/span>(<\/span>u<\/span>))<\/span>:<\/span>(<\/span>y<\/span>(<\/span>u<\/span>))<\/span> \\\r\n           w<\/span> l<\/span> lw<\/span> 5<\/span> lc<\/span> palette<\/span> notitle<\/span><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3\u4e0d\u5177\u5408\u306e\u56de\u907f\u4f8b<\/h4>\n
\u3069\u3046\u3057\u3066\u3082 urange [-0.25:20.25]<\/code> \u306e\u7bc4\u56f2\u3067\u6b63\u3057\u3044\u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3\u3067\u3089\u305b\u3093\u3092\u63cf\u304d\u305f\u3044\u306e\u3067\u3042\u308c\u3070\uff0c\u305f\u3068\u3048\u3070\u534a\u5468\u3054\u3068\u306b\u5730\u9053\u306b\u63cf\u304d\u7d9a\u3051\u308b\u3068\u304b…<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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In\u00a0[6]:<\/div>\n
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set<\/span> samples<\/span> 50<\/span>\r\nu0<\/span> =<\/span> -0<\/span>.25<\/span>\r\nu1<\/span> =<\/span> u0<\/span> +<\/span> 0.5<\/span>\r\n# 0.5 \u5468<\/span>\r\nset<\/span> urange<\/span> [<\/span>u0<\/span>:<\/span>u1<\/span>]<\/span>\r\nN<\/span> =<\/span> 40<\/span>\r\n\r\nsplot<\/span> for<\/span> [<\/span>i<\/span>=<\/span>0<\/span>:<\/span>N<\/span>]<\/span>\\\r\n    '++'<\/span> using<\/span> (<\/span>x<\/span>(<\/span>u<\/span>+<\/span>i<\/span>\/<\/span>2.<\/span>))<\/span>:<\/span>(<\/span>y<\/span>(<\/span>u<\/span>+<\/span>i<\/span>\/<\/span>2.<\/span>))<\/span>:<\/span>(<\/span>z<\/span>(<\/span>u<\/span>+<\/span>i<\/span>\/<\/span>2.<\/span>))<\/span>:<\/span>(<\/span>y<\/span>(<\/span>u<\/span>+<\/span>i<\/span>\/<\/span>2.<\/span>))<\/span> \\\r\n         w<\/span> l<\/span> lw<\/span> 5<\/span> lc<\/span> palette<\/span> notitle<\/span><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u30bd\u30ec\u30ce\u30a4\u30c9\u3092\u6d41\u308c\u308b\u96fb\u6d41\u306b\u3088\u308b\u78c1\u5834<\/h3>\n
\u30bd\u30ec\u30ce\u30a4\u30c9\u306f1\u672c\u306e\u96fb\u7dda\u3092\u87ba\u65cb\u72b6\u306b\u5bc6\u306b\u5dfb\u3044\u305f\u3082\u306e\u3067\u3042\u308b\u3002\u5341\u5206\u306b\u9577\u3044\u30bd\u30ec\u30ce\u30a4\u30c9\u3092\u6d41\u308c\u308b\u96fb\u6d41\u306b\u3088\u308a\uff0c\u30bd\u30ec\u30ce\u30a4\u30c9\u306e\u5185\u90e8\u306b\u306e\u307f\uff0c\u9577\u3055\u65b9\u5411\u306b\u4e00\u5b9a\u306e\u5185\u90e8\u78c1\u5834\u304c\u3067\u304d\u308b\u3053\u3068\u304c\u308f\u304b\u308b\u3002<\/p>\n