add numerical recipes library

2025-09-12 18:55:25 +09:00
parent d4dff245bd
commit 2c75620ec9
1344 changed files with 63869 additions and 0 deletions
--- a/lib/nr/cpp/recipes/amotry.cpp
+++ b/lib/nr/cpp/recipes/amotry.cpp
@@ -0,0 +1,24 @@
+#include "nr.h"
+
+DP NR::amotry(Mat_IO_DP &p, Vec_O_DP &y, Vec_IO_DP &psum, DP funk(Vec_I_DP &),
+	const int ihi, const DP fac)
+{
+	int j;
+	DP fac1,fac2,ytry;
+
+	int ndim=p.ncols();
+	Vec_DP ptry(ndim);
+	fac1=(1.0-fac)/ndim;
+	fac2=fac1-fac;
+	for (j=0;j<ndim;j++)
+		ptry[j]=psum[j]*fac1-p[ihi][j]*fac2;
+	ytry=funk(ptry);
+	if (ytry < y[ihi]) {
+		y[ihi]=ytry;
+		for (j=0;j<ndim;j++) {
+			psum[j] += ptry[j]-p[ihi][j];
+			p[ihi][j]=ptry[j];
+		}
+	}
+	return ytry;
+}