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38 lines
828 B
C
38 lines
828 B
C
#define NRANSI
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#include "nrutil.h"
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#define TOL 2.0e-4
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int ncom;
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double *pcom,*xicom,(*nrfunc)(double []);
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void linmin(double p[], double xi[], int n, double *fret, double (*func)(double []))
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{
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double brent(double ax, double bx, double cx,
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double (*f)(double), double tol, double *xmin);
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double f1dim(double x);
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void mnbrak(double *ax, double *bx, double *cx, double *fa, double *fb,
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double *fc, double (*func)(double));
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int j;
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double xx,xmin,fx,fb,fa,bx,ax;
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ncom=n;
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pcom=dvector(1,n);
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xicom=dvector(1,n);
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nrfunc=func;
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for (j=1;j<=n;j++) {
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pcom[j]=p[j];
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xicom[j]=xi[j];
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}
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ax=0.0;
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xx=1.0;
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mnbrak(&ax,&xx,&bx,&fa,&fx,&fb,f1dim);
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*fret=brent(ax,xx,bx,f1dim,TOL,&xmin);
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for (j=1;j<=n;j++) {
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xi[j] *= xmin;
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p[j] += xi[j];
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}
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free_dvector(xicom,1,n);
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free_dvector(pcom,1,n);
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}
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#undef TOL
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#undef NRANSI
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