{"id":5736,"date":"2023-03-15T12:36:29","date_gmt":"2023-03-15T03:36:29","guid":{"rendered":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/?p=5736"},"modified":"2023-03-17T17:23:27","modified_gmt":"2023-03-17T08:23:27","slug":"sympy-plotting-backends-%e3%81%a7%e3%82%b0%e3%83%a9%e3%83%95%e3%82%92%e6%8f%8f%e3%81%84%e3%81%a6-matplotlib-%e6%b5%81%e3%81%ab%e3%82%aa%e3%83%97%e3%82%b7%e3%83%a7%e3%83%b3%e8%a8%ad%e5%ae%9a%e3%81%99","status":"publish","type":"post","link":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/5736\/","title":{"rendered":"SymPy Plotting Backends \u3067\u30b0\u30e9\u30d5\u3092\u63cf\u3044\u3066 Matplotlib \u6d41\u306b\u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a\u3059\u308b"},"content":{"rendered":"

\u4e00\u65e6 SymPy Plotting Backends \u3067 p = plot()<\/code> \u306a\u3069\u3068\u3057\u3066\u30d7\u30ed\u30c3\u30c8\u3057\u305f\u3089\uff0c\u3042\u3068\u306f ax = p.ax<\/code> \u3068\u3057\u3066 ax<\/code> \u306b\u5bfe\u3057\u3066\u901a\u5e38\u3069\u304a\u308a\u306e Matplotlib \u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a\u3092\u3057\u3066\u3044\u3051\u3070\u3088\u3044\u3068\u3044\u3046\u8a71\u3002<\/p>\n

SymPy \u306f\u95a2\u6570\u3092 symbolic expression \u306e\u307e\u307e\u3067\u30b0\u30e9\u30d5\u306b\u3067\u304d\u308b\u306e\u3067\uff0cNumPy \u306b\u305f\u3088\u3089\u306a\u3044\u3068\u3044\u3046\u65b9\u91dd\u3067\u3084\u3063\u3066\u307f\u308b\u3002<\/p>\n

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SymPy Plotting Backends (SPB) \u3067\u306e\u63cf\u753b\u4f8b<\/h3>\n<\/div>\n<\/div>\n<\/div>\n
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In\u00a0[1]:<\/div>\n
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# \u5ff5\u306e\u305f\u3081\uff0c\u3042\u3089\u305f\u3081\u3066\u5fc5\u8981\u306a\u3082\u306e\u3092 import<\/span>\r\n\r\nfrom<\/span> sympy<\/span> import<\/span> *<\/span>\r\n# 1\u6587\u5b57\u5909\u6570\u306e Symbol \u306e\u5b9a\u7fa9\u304c\u7701\u7565\u3067\u304d\u308b<\/span>\r\nfrom<\/span> sympy.abc<\/span> import<\/span> *<\/span>\r\n\r\n# \u03c0<\/span>\r\nfrom<\/span> sympy<\/span> import<\/span> pi<\/span>\r\nPi<\/span> =<\/span> float<\/span>(<\/span>pi<\/span>)<\/span>\r\n\r\n# SymPy Plotting Backends (SPB)<\/span>\r\nfrom<\/span> spb<\/span> import<\/span> *<\/span>\r\n\r\n# ticks \u306e\u8a2d\u5b9a\u7528<\/span>\r\nimport<\/span> matplotlib.ticker<\/span> as<\/span> tck<\/span>\r\n\r\n# NumPy \u306f import \u3057\u306a\u3044<\/span>\r\n# import numpy as np<\/span>\r\n\r\n# \u30b0\u30e9\u30d5\u3092 SVG \u3067 Notebook \u306b\u30a4\u30f3\u30e9\u30a4\u30f3\u8868\u793a<\/span>\r\n%<\/span>config<\/span> InlineBackend.figure_formats = ['svg']\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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SymPy Plotting Backends (SPB) \u3092 import \u3059\u308b\u3068\uff0c\u5916\u67a0\u3068\u30b0\u30ea\u30c3\u30c9\u304c\u81ea\u52d5\u3067\u63cf\u304b\u308c\u308b\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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In\u00a0[2]:<\/div>\n
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plot<\/span>(<\/span>sin<\/span>(<\/span>x<\/span>),<\/span> (<\/span>x<\/span>,<\/span> -<\/span>pi<\/span>,<\/span> pi<\/span>),<\/span> ylabel<\/span>=<\/span>\"sin x\"<\/span>)<\/span>;<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\"\"<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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xticks, yticks \u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/h3>\n
$x$ \u8ef8\uff0c$y$ \u8ef8\u306e\u76ee\u76db\u306e\u523b\u307f\u5e45\u3068\u30e9\u30d9\u30eb\u306e\u8a2d\u5b9a\u4f8b\uff08NumPy \u306b\u305f\u3088\u3089\u305a\u306b\uff09\u3002np.linspace()<\/code> \u3084 np.arange()<\/code> \u3092\u4f7f\u308f\u305a\u306b xticks, yticks \u3092\u8a2d\u5b9a\u3059\u308b\u306e\u306b\uff0cPython \u306e\u6a19\u6e96\u7684\u306a\u30ea\u30b9\u30c8\u4f5c\u6210\u6a5f\u80fd\u3092\u4f7f\u3046\u3002\u305f\u3068\u3048\u3070…<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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In\u00a0[3]:<\/div>\n
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[<\/span>0.5<\/span>*<\/span>i<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)]<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Out[3]:<\/div>\n
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[-1.0, -0.5, 0.0, 0.5, 1.0]<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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In\u00a0[4]:<\/div>\n
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# \u3044\u3063\u305f\u3093 SymPy \u3067\u30d7\u30ed\u30c3\u30c8\u3059\u308b\uff08\u975e\u8868\u793a\uff09<\/span>\r\np<\/span> =<\/span> plot<\/span>(<\/span>sin<\/span>(<\/span>x<\/span>),<\/span> (<\/span>x<\/span>,<\/span> -<\/span>pi<\/span>,<\/span> pi<\/span>),<\/span> ylabel<\/span>=<\/span>\"sin x\"<\/span>,<\/span> show<\/span>=<\/span>False<\/span>)<\/span>\r\n\r\nax<\/span> =<\/span> p<\/span>.<\/span>ax<\/span>\r\n\r\n# x \u8ef8\u306e\u76ee\u76db\u306f 0.5\u03c0 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>set_xticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span>*<\/span>Pi<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)])<\/span>\r\nax<\/span>.<\/span>set_xticklabels<\/span>([(<\/span>'<\/span>%g<\/span>'<\/span> %<\/span> (<\/span>0.5<\/span>*<\/span>i<\/span>))<\/span>+<\/span>\" $\\pi$\"<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span>3<\/span>)])<\/span>\r\n\r\n# y \u306e\u76ee\u76db\u3092 0.5 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>set_yticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)]);<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\"\"<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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$1\\, \\pi$ \u3068\u304b $0\\,\\pi$ \u3068\u304b\uff0c\u4eca\u3072\u3068\u3064\u306a\u306e\u3067\u5c11\u3057\u9762\u5012\u3060\u304c\u4e00\u3064\u305a\u3064\u8a2d\u5b9a\u3057\u3066\u307f\u308b\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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In\u00a0[5]:<\/div>\n
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p<\/span> =<\/span> plot<\/span>(<\/span>sin<\/span>(<\/span>x<\/span>),<\/span> (<\/span>x<\/span>,<\/span> -<\/span>pi<\/span>,<\/span> pi<\/span>),<\/span> ylabel<\/span>=<\/span>\"sin x\"<\/span>,<\/span> show<\/span>=<\/span>False<\/span>)<\/span>\r\n\r\nax<\/span> =<\/span> p<\/span>.<\/span>ax<\/span>\r\n\r\n# x \u8ef8\u306e\u76ee\u76db\u306f 0.5\u03c0 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>set_xticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span>*<\/span>Pi<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)])<\/span>\r\n# x \u8ef8\u306e\u76ee\u76db\u306e\u30e9\u30d9\u30eb\u3092\u624b\u52d5\u3067\u8a2d\u5b9a<\/span>\r\nax<\/span>.<\/span>set_xticklabels<\/span>([<\/span>\"$-\\pi$\"<\/span>,<\/span> \"$-\\pi\/2$\"<\/span>,<\/span> \"$0$\"<\/span>,<\/span> \"$\\pi\/2$\"<\/span>,<\/span> \"$\\pi$\"<\/span>])<\/span>\r\n\r\n# y \u306e\u76ee\u76db\u3092 0.5 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>set_yticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)]);<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\"\"<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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grid \u306e linestyle \u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/h3>\n
\u30b0\u30ea\u30c3\u30c9\u3092\u8584\u3044\u7070\u8272\u306e\u7d30\u3081\u306e\u70b9\u7dda\u306b\u3057\u3066\u76ee\u7acb\u305f\u306a\u304f\u3055\u305b\u308b\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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In\u00a0[6]:<\/div>\n
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p<\/span> =<\/span> plot<\/span>(<\/span>sin<\/span>(<\/span>x<\/span>),<\/span> (<\/span>x<\/span>,<\/span> -<\/span>pi<\/span>,<\/span> pi<\/span>),<\/span> ylabel<\/span>=<\/span>\"sin x\"<\/span>,<\/span> show<\/span>=<\/span>False<\/span>)<\/span>\r\n\r\nax<\/span> =<\/span> p<\/span>.<\/span>ax<\/span>\r\nax<\/span>.<\/span>set_xticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span>*<\/span>Pi<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)])<\/span>\r\nax<\/span>.<\/span>set_xticklabels<\/span>([<\/span>\"$-\\pi$\"<\/span>,<\/span> \"$-\\pi\/2$\"<\/span>,<\/span> \"$0$\"<\/span>,<\/span> \"$\\pi\/2$\"<\/span>,<\/span> \"$\\pi$\"<\/span>])<\/span>\r\nax<\/span>.<\/span>set_yticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)]);<\/span>\r\n\r\n# grid \u3092\u7d30\u3044\u70b9\u7dda\u3067<\/span>\r\nax<\/span>.<\/span>grid<\/span>(<\/span>True<\/span>,<\/span> which<\/span>=<\/span>\"major\"<\/span>,<\/span> color<\/span>=<\/span>\"lightgray\"<\/span>,<\/span> dashes<\/span>=<\/span>(<\/span>3<\/span>,<\/span> 5<\/span>),<\/span> linewidth<\/span>=<\/span>0.5<\/span>);<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\"\"<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u526f\u76ee\u76db minorticks \u306e\u8868\u793a\u3068\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/h3>\n
\u4e3b\u76ee\u76db\u306f $0.5\\,\\pi$ \u3054\u3068\u306a\u306e\u3067\uff0c\u305d\u306e\u9593\u306b\u526f\u76ee\u76db (minorticks) \u3082\u3064\u3051\u308b\u3002<\/p>\n
\u307e\u305f\uff0c\u526f\u76ee\u76db\u306b\u3082\u30b0\u30ea\u30c3\u30c9\u3092\u3064\u3051\u308b\u3068\u7169\u308f\u3057\u3044\u306e\u3067\uff0c\u30b0\u30ea\u30c3\u30c9\u306f\u4e3b\u76ee\u76db\u306e\u307f\u306b\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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In\u00a0[7]:<\/div>\n
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p<\/span> =<\/span> plot<\/span>(<\/span>sin<\/span>(<\/span>x<\/span>),<\/span> (<\/span>x<\/span>,<\/span> -<\/span>pi<\/span>,<\/span> pi<\/span>),<\/span> ylabel<\/span>=<\/span>\"sin x\"<\/span>,<\/span> show<\/span>=<\/span>False<\/span>)<\/span>\r\n\r\nax<\/span> =<\/span> p<\/span>.<\/span>ax<\/span>\r\nax<\/span>.<\/span>set_xticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span>*<\/span>Pi<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)])<\/span>\r\nax<\/span>.<\/span>set_xticklabels<\/span>([<\/span>\"$-\\pi$\"<\/span>,<\/span> \"$-\\pi\/2$\"<\/span>,<\/span> \"$0$\"<\/span>,<\/span> \"$\\pi\/2$\"<\/span>,<\/span> \"$\\pi$\"<\/span>])<\/span>\r\nax<\/span>.<\/span>set_yticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)]);<\/span>\r\nax<\/span>.<\/span>grid<\/span>(<\/span>True<\/span>,<\/span> which<\/span>=<\/span>\"major\"<\/span>,<\/span> color<\/span>=<\/span>\"lightgray\"<\/span>,<\/span> dashes<\/span>=<\/span>(<\/span>3<\/span>,<\/span> 5<\/span>),<\/span> linewidth<\/span>=<\/span>0.5<\/span>)<\/span>\r\n\r\n# \u526f\u76ee\u76db\u3082\u8868\u793a<\/span>\r\nax<\/span>.<\/span>minorticks_on<\/span>()<\/span>\r\n# \u526f\u76ee\u76db\u306b\u306f grid \u3092\u3064\u3051\u306a\u3044<\/span>\r\nax<\/span>.<\/span>grid<\/span>(<\/span>False<\/span>,<\/span> which<\/span>=<\/span>\"minor\"<\/span>)<\/span>\r\n\r\n# \u526f\u76ee\u76db\u306e\u523b\u307f\u5e45\u306f\u81ea\u52d5\u3067\u3064\u304f\u304c\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u53ef<\/span>\r\n# x \u306e\u526f\u76ee\u76db\u306f 0.1\u03c0 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>set_xticks<\/span>([<\/span>0.1<\/span>*<\/span>i<\/span>*<\/span>Pi<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>10<\/span>,<\/span> 11<\/span>)],<\/span> minor<\/span>=<\/span>True<\/span>)<\/span>\r\n# y \u306e\u526f\u76ee\u76db\u306f 0.1 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>set_yticks<\/span>([<\/span>0.1<\/span>*<\/span>i<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>10<\/span>,<\/span> 11<\/span>)],<\/span> minor<\/span>=<\/span>True<\/span>)<\/span>;\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\"\"<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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x \u8ef8, y \u8ef8\u306e\u8868\u793a<\/h3>\n
$x$ \u8ef8\uff08$y = 0$\uff09\u3068 $y$ \u8ef8\uff08$x = 0$\uff09\u3092 axhline()<\/code> \u3068 axvline()<\/code> \u3092\u4f7f\u3063\u3066\u8868\u793a\u3055\u305b\u308b\u3002\u901a\u5e38\u306e\u30b0\u30ea\u30c3\u30c9\u3068\u533a\u5225\u3059\u308b\u305f\u3081\u306b\u9ed2\u8272\u3067\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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In\u00a0[8]:<\/div>\n
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p<\/span> =<\/span> plot<\/span>(<\/span>sin<\/span>(<\/span>x<\/span>),<\/span> (<\/span>x<\/span>,<\/span> -<\/span>pi<\/span>,<\/span> pi<\/span>),<\/span> ylabel<\/span>=<\/span>\"sin x\"<\/span>,<\/span> show<\/span>=<\/span>False<\/span>)<\/span>\r\n\r\nax<\/span> =<\/span> p<\/span>.<\/span>ax<\/span>\r\nax<\/span>.<\/span>set_xticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span>*<\/span>Pi<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)])<\/span>\r\nax<\/span>.<\/span>set_xticklabels<\/span>([<\/span>\"$-\\pi$\"<\/span>,<\/span> \"$-\\pi\/2$\"<\/span>,<\/span> \"$0$\"<\/span>,<\/span> \"$\\pi\/2$\"<\/span>,<\/span> \"$\\pi$\"<\/span>])<\/span>\r\nax<\/span>.<\/span>set_yticks<\/span>([<\/span>0.5<\/span>*<\/span>i<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>2<\/span>,<\/span> 3<\/span>)]);<\/span>\r\nax<\/span>.<\/span>grid<\/span>(<\/span>True<\/span>,<\/span> which<\/span>=<\/span>\"major\"<\/span>,<\/span> color<\/span>=<\/span>\"lightgray\"<\/span>,<\/span> dashes<\/span>=<\/span>(<\/span>3<\/span>,<\/span> 5<\/span>),<\/span> linewidth<\/span>=<\/span>0.5<\/span>)<\/span>\r\nax<\/span>.<\/span>minorticks_on<\/span>()<\/span>\r\nax<\/span>.<\/span>grid<\/span>(<\/span>False<\/span>,<\/span> which<\/span>=<\/span>\"minor\"<\/span>)<\/span>\r\nax<\/span>.<\/span>set_xticks<\/span>([<\/span>0.1<\/span>*<\/span>i<\/span>*<\/span>Pi<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>10<\/span>,<\/span> 11<\/span>)],<\/span> minor<\/span>=<\/span>True<\/span>)<\/span>\r\nax<\/span>.<\/span>set_yticks<\/span>([<\/span>0.1<\/span>*<\/span>i<\/span> for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>-<\/span>10<\/span>,<\/span> 11<\/span>)],<\/span> minor<\/span>=<\/span>True<\/span>)<\/span>\r\n\r\n# x\u8ef8 y\u8ef8<\/span>\r\nax<\/span>.<\/span>axhline<\/span>(<\/span>0<\/span>,<\/span> color<\/span>=<\/span>'black'<\/span>,<\/span> dashes<\/span>=<\/span>(<\/span>3<\/span>,<\/span> 5<\/span>),<\/span> linewidth<\/span>=<\/span>0.5<\/span>)<\/span>\r\nax<\/span>.<\/span>axvline<\/span>(<\/span>0<\/span>,<\/span> color<\/span>=<\/span>'black'<\/span>,<\/span> dashes<\/span>=<\/span>(<\/span>3<\/span>,<\/span> 5<\/span>),<\/span> linewidth<\/span>=<\/span>0.5<\/span>);<\/span>\r\np<\/span>.<\/span>save<\/span>(<\/span>\"spbax05.svg\"<\/span>);<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u53c2\u8003\uff1aLocater, Formatter \u3092\u4f7f\u3063\u305f ticks \u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/h3>\n
\u4ee5\u4e0b\u306e\u3088\u3046\u306b matplotlib.ticker<\/code> \u3092 import \u3057\uff0cMultipleLocator()<\/code> \u3084 FormatStrFormatter()<\/code> \u3092\u4f7f\u3063\u3066\u76ee\u76db\u30fb\u30e9\u30d9\u30eb\u306e\u8a2d\u5b9a\u304c\u3067\u304d\u308b\u3002<\/p>\n
\u305f\u3060\u3057\uff0c$x = 3.1415…$ \u306e\u3068\u3053\u308d\u306b $\\pi$ \u3068\u30e9\u30d9\u30eb\u3092\u3064\u3051\u308b\u305f\u3081\u306b\u306f\u5c11\u3057\u5de5\u592b\u304c\u3044\u308b\u3002\u4ee5\u4e0b\u3067\u306f $x = 1$ \u306e\u3068\u3053\u308d\u306b $\\pi$ \u3068\u30e9\u30d9\u30eb\u3092\u3064\u3051\u3066\u3044\u308b\u3002$y = \\sin \\pi x$ \u3068\u3057\u3066\u3044\u308b\u306e\u3067\uff0c\u5b9f\u52b9\u7684\u306b\u306f $x = 1$ \u306e\u3068\u304d\u306f $ y = \\sin \\pi$ \u306e\u5024\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3060\u304c…<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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import<\/span> matplotlib.ticker<\/span> as<\/span> tck<\/span>\r\n\r\n# sin \u306e\u5f15\u6570\u306b \u03c0 \u3092\u304b\u3051\uff0cx \u306e\u7bc4\u56f2\u3092 -1 \u304b\u3089 1 \u306b<\/span>\r\np<\/span> =<\/span> plot<\/span>(<\/span>sin<\/span>(<\/span>pi<\/span>*<\/span>x<\/span>),<\/span> (<\/span>x<\/span>,<\/span> -<\/span>1<\/span>,<\/span> 1<\/span>),<\/span> ylabel<\/span>=<\/span>\"sin x\"<\/span>,<\/span> show<\/span>=<\/span>False<\/span>)<\/span>\r\n\r\nax<\/span> =<\/span> p<\/span>.<\/span>ax<\/span>\r\nax<\/span>.<\/span>grid<\/span>(<\/span>True<\/span>,<\/span> which<\/span>=<\/span>\"major\"<\/span>,<\/span> color<\/span>=<\/span>\"lightgray\"<\/span>,<\/span> dashes<\/span>=<\/span>(<\/span>3<\/span>,<\/span> 5<\/span>),<\/span> linewidth<\/span>=<\/span>0.5<\/span>)<\/span>\r\nax<\/span>.<\/span>axhline<\/span>(<\/span>0<\/span>,<\/span> color<\/span>=<\/span>'black'<\/span>,<\/span> dashes<\/span>=<\/span>(<\/span>3<\/span>,<\/span> 5<\/span>),<\/span> linewidth<\/span>=<\/span>0.5<\/span>)<\/span>\r\nax<\/span>.<\/span>axvline<\/span>(<\/span>0<\/span>,<\/span> color<\/span>=<\/span>'black'<\/span>,<\/span> dashes<\/span>=<\/span>(<\/span>3<\/span>,<\/span> 5<\/span>),<\/span> linewidth<\/span>=<\/span>0.5<\/span>);<\/span>\r\n\r\n# x \u306e\u4e3b\u76ee\u76db\u3092 0.5\u03c0 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>xaxis<\/span>.<\/span>set_major_locator<\/span>(<\/span>tck<\/span>.<\/span>MultipleLocator<\/span>(<\/span>0.5<\/span>))<\/span>\r\nax<\/span>.<\/span>xaxis<\/span>.<\/span>set_major_formatter<\/span>(<\/span>tck<\/span>.<\/span>FormatStrFormatter<\/span>(<\/span>'<\/span>%g<\/span> $\\pi$'<\/span>))<\/span>\r\n# y \u306e\u4e3b\u76ee\u76db\u3092 0.5 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>yaxis<\/span>.<\/span>set_major_locator<\/span>(<\/span>tck<\/span>.<\/span>MultipleLocator<\/span>(<\/span>0.5<\/span>));<\/span>\r\n\r\n# \u526f\u76ee\u76db\u3082\u8868\u793a<\/span>\r\nax<\/span>.<\/span>minorticks_on<\/span>()<\/span>\r\n# x \u8ef8\u306e\u526f\u76ee\u76db\u306f 0.1 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>xaxis<\/span>.<\/span>set_minor_locator<\/span>(<\/span>tck<\/span>.<\/span>MultipleLocator<\/span>(<\/span>0.1<\/span>))<\/span>\r\n# y \u8ef8\u306e\u526f\u76ee\u76db\u306f 0.1 \u3054\u3068\u306b<\/span>\r\nax<\/span>.<\/span>yaxis<\/span>.<\/span>set_minor_locator<\/span>(<\/span>tck<\/span>.<\/span>MultipleLocator<\/span>(<\/span>0.1<\/span>))<\/span>\r\n# \u526f\u76ee\u76db\u306b\u306f grid \u3092\u3064\u3051\u306a\u3044<\/span>\r\nax<\/span>.<\/span>grid<\/span>(<\/span>False<\/span>,<\/span> which<\/span>=<\/span>\"minor\"<\/span>);<\/span>\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\"\"<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u65e6 SymPy Plotting Backends \u3067 p = plot() \u306a\u3069\u3068\u3057\u3066\u30d7\u30ed\u30c3\u30c8\u3057\u305f\u3089\uff0c\u3042\u3068\u306f ax = p.ax \u3068\u3057\u3066 ax \u306b\u5bfe\u3057\u3066\u901a\u5e38\u3069\u304a\u308a\u306e Matplotlib \u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a\u3092\u3057\u3066\u3044\u3051\u3070\u3088\u3044\u3068\u3044\u3046\u8a71\u3002<\/p>\n
SymPy \u306f\u95a2\u6570\u3092 symbolic expression \u306e\u307e\u307e\u3067\u30b0\u30e9\u30d5\u306b\u3067\u304d\u308b\u306e\u3067\uff0cNumPy \u306b\u305f\u3088\u3089\u306a\u3044\u3068\u3044\u3046\u65b9\u91dd\u3067\u3084\u3063\u3066\u307f\u308b\u3002<\/p>
\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":33,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[13,12],"tags":[],"class_list":["post-5736","post","type-post","status-publish","format-standard","hentry","category-matplotlib","category-sympy","nodate","item-wrap"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/posts\/5736","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/users\/33"}],"replies":[{"embeddable":true,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/comments?post=5736"}],"version-history":[{"count":6,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/posts\/5736\/revisions"}],"predecessor-version":[{"id":5792,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/posts\/5736\/revisions\/5792"}],"wp:attachment":[{"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/media?parent=5736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/categories?post=5736"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/tags?post=5736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}