{"id":148,"date":"2013-08-24T04:08:59","date_gmt":"2013-08-23T19:08:59","guid":{"rendered":"https:\/\/www.dogrow.net\/octave\/?p=148"},"modified":"2019-10-26T19:53:58","modified_gmt":"2019-10-26T10:53:58","slug":"blog18","status":"publish","type":"post","link":"https:\/\/www.dogrow.net\/octave\/blog18\/","title":{"rendered":"(18) \u884c\u5217\u8a08\u7b97\u3067\u4e2d1\u30ec\u30d9\u30eb\u9023\u7acb\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f"},"content":{"rendered":"<p>2\u5143\u9023\u7acb1\u6b21\u65b9\u7a0b\u5f0f\u3092 Octave\u3092\u4f7f\u3063\u3066\u89e3\u3044\u3066\u307f\u308b\u3002<\/p>\n<p>\u307e\u305a\u306f\u8a71\u3092\u7c21\u5358\u306b\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7c21\u5358\u306a2\u5f0f\u306e\u9023\u7acb\u65b9\u7a0b\u5f0f\u3092\u89e3\u3044\u3066\u307f\u308b\u3002<br \/>\ny = 2x + 4<br \/>\ny = -2x + 16<\/p>\n<p>Octave\u3067\u30b0\u30e9\u30d5\u8868\u793a\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u76f4\u7dda\u304c\u73fe\u308c\u308b\u3002<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:21&gt; x=[-10:10]\r\nx =\r\n  -10   -9   -8   -7   -6   -5   -4   -3   -2   -1    0    1    2    3    4    5    6    7    8    9   10\r\n\r\noctave:22&gt; y1 = 2 * x + 4\r\ny1 =\r\n  -16  -14  -12  -10   -8   -6   -4   -2    0    2    4    6    8   10   12   14   16   18   20   22   24\r\n\r\noctave:23&gt; y2 = -2 * x + 16\r\ny2 =\r\n   36   34   32   30   28   26   24   22   20   18   16   14   12   10    8    6    4    2    0   -2   -4\r\n\r\noctave:24&gt; plot(x,y1,x,y2)\r\noctave:25&gt;<\/pre>\n<p><img decoding=\"async\" alt=\"\" src=\"https:\/\/www.dogrow.net\/octave\/wp-content\/uploads\/2013\/08\/20130824_001.jpg\" \/><\/p>\n<p>\u307e\u305a\u306f\u4e0e\u3048\u3089\u308c\u305f2\u5f0f\u3092\u884c\u5217\u3067\u8868\u305b\u308b\u3088\u3046\u306b\u5404\u9805\u3092\u4e26\u3073\u66ff\u3048\u308b\u3002<br \/>\ny = 2x + 4<br \/>\ny = -2x + 16<br \/>\n\u3000\u2193<br \/>\n2x &#8211; y = -4<br \/>\n-2x &#8211; y = -16<\/p>\n<p>\u3053\u308c\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u884c\u5217\u5f0f\u3067\u8868\u3057\u3001\u4e21\u8fba\u306b\u9006\u884c\u5217\u3092\u304b\u3051\u3066\u89e3\u3092\u6c42\u3081\u308b\u3002<br \/>\n<img decoding=\"async\" alt=\"\" src=\"https:\/\/www.dogrow.net\/octave\/wp-content\/uploads\/2013\/08\/20130824_002.jpg\" \/><\/p>\n<p>\u3053\u308c\u3092Octave\u3067\u66f8\u304f\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:24&gt; A=[2 -1 ; -2 -1]\r\nA =\r\n   2  -1\r\n  -2  -1\r\n\r\noctave:25&gt; B=[-4 ; -16]\r\nB =\r\n   -4\r\n  -16\r\n\r\noctave:26&gt; Ainv=inv(A)\r\nAinv =\r\n   0.25000  -0.25000\r\n  -0.50000  -0.50000\r\n\r\noctave:27&gt; xy=Ainv * B\r\nxy =\r\n    3\r\n   10\r\n\r\noctave:28&gt;\r\n<\/pre>\n<p>x=3, y=10 \u304c\u6c42\u307e\u3063\u305f\u3002<\/p>\n<p><span class=\"my_fc_crimsonBBig\">\u203b\u6ce8\u610f<\/span><br \/>\n\u3053\u306e\u65b9\u6cd5\u306f\u3044\u3064\u3067\u3082\u4f7f\u3048\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002<br \/>\n\u884c\u5217A\u304c\u9006\u884c\u5217\u3092\u6301\u305f\u306a\u3044\u5834\u5408\u3001\u3059\u306a\u308f\u3061\u4e21\u65b9\u306e\u5f0f\u306e\u50be\u304d\u304c\u540c\u3058\u5834\u5408\u30012\u672c\u306e\u76f4\u7dda\u306f\u4ea4\u70b9\u3092\u6301\u305f\u305a\u3001\u9023\u7acb\u65b9\u7a0b\u5f0f\u3068\u3057\u3066\u6210\u308a\u7acb\u305f\u306a\u3044\u3002<br \/>\n\u3053\u308c\u3092Octave\u3067\u78ba\u8a8d\u3057\u3066\u307f\u308b\u3002<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:34&gt; A=[1 2;4 8]\r\nA =\r\n   1   2\r\n   4   8\r\n\r\noctave:35&gt; Ainv=inv(A)\r\n<span class=\"my_fc_crimsonB\">warning: inverse: matrix singular to machine precision, rcond = 0<\/span>\r\nAinv =\r\n   Inf   Inf\r\n   Inf   Inf\r\n\r\noctave:36&gt;<\/pre>\n<p>\u9006\u884c\u5217\u304c\u6c42\u307e\u3089\u306a\u304b\u3063\u305f\u3002<br \/>\n2\u51431\u6b21\u65b9\u7a0b\u5f0f\u3067\u3042\u308c\u3070\u30a4\u30e1\u30fc\u30b8\u304c\u308f\u304d\u3084\u3059\u3044\u304c\u30013\u5143,4\u5143,&#8230;,\u591a\u5143\u9023\u7acb\u65b9\u7a0b\u5f0f\u306b\u306a\u308b\u3068\u76f4\u611f\u7684\u306b\u9006\u884c\u5217\u306e\u5b58\u5728\u6709\u7121\u3092\u5224\u65ad\u3067\u304d\u306a\u3044\u3002<\/p>\n<p>\u6b21\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a4\u51431\u6b21\u9023\u7acb\u65b9\u7a0b\u5f0f\u3092\u89e3\u3044\u3066\u307f\u308b\u3002<br \/>\na + 2b + 3c + 4d = 8<br \/>\n5a + 4b + 6c + 7d = 3<br \/>\n6a + 3b + 4c + 9d = 9<br \/>\n5a + 7b + c + 5d = 5<\/p>\n<pre class=\"my_pre_octave\">\r\noctave:37&gt; A=[1 2 3 4;5 4 6 7;6 3 4 9;5 7 1 5]\r\nA =\r\n   1   2   3   4\r\n   5   4   6   7\r\n   6   3   4   9\r\n   5   7   1   5\r\n\r\noctave:38&gt; B=[8;3;9;5]\r\nB =\r\n   8\r\n   3\r\n   9\r\n   5\r\n\r\noctave:39&gt; i=inv(A)\r\ni =\r\n  -5.5674e-01   2.3404e-01   6.7376e-02  -3.5461e-03\r\n   1.6667e-01  -2.5967e-17  -1.6667e-01   1.6667e-01\r\n  -3.1915e-02   3.1915e-01  -1.8085e-01  -9.5745e-02\r\n   3.2979e-01  -2.9787e-01   2.0213e-01  -1.0638e-02\r\n\r\noctave:40&gt; A*i\r\nans =\r\n   1.00000   0.00000   0.00000  -0.00000\r\n   0.00000   1.00000  -0.00000  -0.00000\r\n   0.00000   0.00000   1.00000  -0.00000\r\n   0.00000   0.00000   0.00000   1.00000\r\n\r\noctave:41&gt; i*B\r\nans =\r\n  -3.16312\r\n   0.66667\r\n  -1.40426\r\n   3.51064\r\n\r\noctave:42&gt;\r\n<\/pre>\n<p>a=-3.16312, b=0.66667, c=-1.40426, d=3.51064 \u304c\u6c42\u307e\u3063\u305f\u3002<\/p>\n<p><span class=\"my_fc_deeppinkBBig\">\u2605\u78ba\u8a8d<\/span><br \/>\n\u9006\u884c\u5217\u3068\u5143\u306e\u884c\u5217\u306e\u7a4d\u306f1(=\u5358\u4f4d\u884c\u5217)\u3068\u306a\u308b\u3002<br \/>\n\u4e0a\u3067\u306f\u300coctave:40\u300d\u306e A*i \u3067\u3053\u308c\u3092\u78ba\u8a8d\u3057\u3001\u9006\u884c\u5217\u304c\u6b63\u3057\u304f\u6c42\u3081\u3089\u308c\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u3044\u308b\u3002<\/p>\n<hr class=\"my_hr_bottom\">\n","protected":false},"excerpt":{"rendered":"<p>2\u5143\u9023\u7acb1\u6b21\u65b9\u7a0b\u5f0f\u3092 Octave\u3092\u4f7f\u3063\u3066\u89e3\u3044\u3066\u307f\u308b\u3002 \u307e\u305a\u306f\u8a71\u3092\u7c21\u5358\u306b\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7c21\u5358\u306a2\u5f0f\u306e\u9023\u7acb\u65b9\u7a0b\u5f0f\u3092\u89e3\u3044\u3066\u307f\u308b\u3002 y = 2x + 4 y = -2x + 16 Octave\u3067\u30b0\u30e9\u30d5\u8868\u793a\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u2026 <span class=\"read-more\"><a href=\"https:\/\/www.dogrow.net\/octave\/blog18\/\">\u7d9a\u304d\u3092\u8aad\u3080 &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-148","post","type-post","status-publish","format-standard","hentry","category-5"],"views":8637,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/posts\/148","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/comments?post=148"}],"version-history":[{"count":21,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/posts\/148\/revisions"}],"predecessor-version":[{"id":976,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/posts\/148\/revisions\/976"}],"wp:attachment":[{"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/media?parent=148"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/categories?post=148"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dogrow.net\/octave\/wp-json\/wp\/v2\/tags?post=148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}