\u628a\u4ee5\u524d\u5199\u7684\u90a3\u4e2aDelphi\u7248\u672c\u7ffb\u8bd1\u6210\u4e86C#\u8bed\u8a00\u3002<\/p>\n
\r\nusing System;\r\nusing System.Collections.Generic;\r\nusing System.ComponentModel;\r\nusing System.Data;\r\nusing System.Drawing;\r\nusing System.Linq;\r\nusing System.Text;\r\nusing System.Windows.Forms;\r\n\r\nnamespace \u62c9\u683c\u6717\u65e5\u5185\u63d2\r\n{\r\n public partial class Form1 : Form\r\n {\r\n public Form1()\r\n {\r\n InitializeComponent();\r\n }\r\n \/\/\/ <summary>\r\n \/\/\/ \u62c9\u683c\u6717\u65e5\u5185\u63d2\r\n \/\/\/ <\/summary>\r\n \/\/\/ <param name="fx">x\u5e8f\u5217<\/param>\r\n \/\/\/ <param name="fy">y\u5e8f\u5217<\/param>\r\n \/\/\/ <param name="xx">\u8981\u63d2\u503c\u7684x\u5e8f\u53f7<\/param>\r\n \/\/\/ <param name="n">\u9636\u6570<\/param>\r\n \/\/\/ <returns><\/returns>\r\n public double lagrange(double[] fx, double[] fy, double xx, int n)\r\n {\r\n double[] a = new double[n + 1];\r\n double[] fx2 = new double[n + 1];\r\n double[] fy2 = new double[n + 1];\r\n int sum1 = 0;\r\n int half_n = n \/ 2;\r\n int len = fx.Length - 1;\r\n \/\/===================BEGIN=========\u53d6nn\u4e2a\u6570\u53c2\u4e0e\u63d2\u503c\uff0c\u4f7f\u8981\u6c42\u7684\u6570\u5728\u5176\u4e2d\u95f4========\r\n int st_n = Convert.ToInt32(Math.Truncate(xx - fx[0])) \/ (15 * 60); \/\/\u65f6\u95f4\u5904\u4e8e\u7b2c\u51e0\u4e2a15\u5206\u949f\r\n if (st_n >= len) \/\/\u8d85\u51fa\u6240\u6709\r\n {\r\n for (int j = len - n; j <= len; j++)\r\n {\r\n fx2[sum1] = fx[j];\r\n fy2[sum1] = fy[j];\r\n sum1++;\r\n }\r\n }\r\n else if (st_n <= 0) \/\/\u4f4e\u4e8e\u6240\u6709\r\n {\r\n for (int j = 0; j <= n; j++)\r\n {\r\n fx2[sum1] = fx[j];\r\n fy2[sum1] = fy[j];\r\n sum1++;\r\n }\r\n }\r\n else if (len - st_n < half_n) \/\/\u53f3\u8fb9\u4e0d\u591f\r\n {\r\n for (int j = st_n; j <= len; j++)\r\n {\r\n fx2[sum1] = fx[j];\r\n fy2[sum1] = fy[j];\r\n sum1++;\r\n }\r\n for (int j = len - n + 1; j <= st_n; j++)\r\n {\r\n fx2[sum1] = fx[j - 1];\r\n fy2[sum1] = fy[j - 1];\r\n sum1++;\r\n }\r\n }\r\n else if (st_n < (n \/ 2)) \/\/\u5de6\u8fb9\u4e0d\u591f\r\n {\r\n for (int j = 0; j <= st_n; j++)\r\n {\r\n fx2[sum1] = fx[j];\r\n fy2[sum1] = fy[j];\r\n sum1++;\r\n }\r\n for (int j = st_n + 1; j <= n; j++)\r\n {\r\n fx2[sum1] = fx[j];\r\n fy2[sum1] = fy[j];\r\n sum1++;\r\n }\r\n }\r\n else \/\/\u4e24\u8fb9\u90fd\u591f\r\n {\r\n for (int j = (st_n - (n \/ 2)); j <= st_n; j++)\r\n {\r\n fx2[sum1] = fx[j];\r\n fy2[sum1] = fy[j];\r\n sum1++;\r\n }\r\n for (int j = st_n + 1; j <= st_n + n - (n \/ 2); j++)\r\n {\r\n fx2[sum1] = fx[j];\r\n fy2[sum1] = fy[j];\r\n sum1++;\r\n }\r\n }\r\n \/\/========================END======\u53d6nn\u4e2a\u6570\u53c2\u4e0e\u63d2\u503c\uff0c\u4f7f\u8981\u6c42\u7684\u6570\u5728\u5176\u4e2d\u95f4========\r\n double yy = 0;\r\n for (int i = 0; i <= n; i++)\r\n {\r\n a[i] = fy2[i];\r\n for (int j = 0; j <= n; j++)\r\n {\r\n if (j != i)\r\n {\r\n a[i] = a[i] * (xx - fx2[j]) \/ (fx2[i] - fx2[j]);\r\n }\r\n }\r\n yy = yy + a[i];\r\n }\r\n return yy;\r\n }\r\n \/\/\u51fd\u6570\u6d4b\u8bd5\r\n private void button1_Click(object sender, EventArgs e)\r\n {\r\n int N = 4;\r\n double[] fx = new double[5] { 0.4, 0.55, 0.8, 0.9, 1 };\r\n double[] fy = new double[5] { 0.41075, 0.57815, 0.88811, 1.02652, 1.17520 };\r\n double x = 0.5;\r\n MessageBox.Show(lagrange(fx, fy, x, N).ToString());\r\n }\r\n }\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"\u628a\u4ee5\u524d\u5199\u7684\u90a3\u4e2aDelphi\u7248\u672c\u7ffb\u8bd1\u6210\u4e86C#\u8bed\u8a00\u3002 using System; using System.Col […]<\/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-1215","post","type-post","status-publish","format-standard","hentry","category-diary"],"_links":{"self":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/1215","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/comments?post=1215"}],"version-history":[{"count":4,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/1215\/revisions"}],"predecessor-version":[{"id":4575,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/1215\/revisions\/4575"}],"wp:attachment":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/media?parent=1215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/categories?post=1215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/tags?post=1215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}