}/* for i *//* Print entries of A *//* do not use gsl_matrix_fprintf */printf("Solution of the system Ax=b via PLU factorizations\n");printf("Matrix A:\n");for(i =0; i < nr; i++) {for(j =0; j < nc; j++)printf("%7.2g ", gsl_matrix_get (A, i, j));putcha...
BHHH_maximizer_free(sp); return BHHH_FAIL; } // positive-definite? int pd=1; gsl_eigen_symm_workspace *ws=gsl_eigen_symm_alloc(s->K); gsl_matrix *Hp=gsl_matrix_alloc(s->K,s->K); gsl_matrix_memcpy(Hp,s->invH); gsl_vector *eigva=gsl_vector_alloc(s->K); gsl_eigen_symm(Hp...
#include<stdio.h>#include<gsl/gsl_matrix.h>intmatrix_define_test(){// 定义一个3x3的矩阵(注意这里是一个指针)gsl_matrix*m=gsl_matrix_alloc(3,3);// 设置矩阵m的(0,0)位置为1.23gsl_matrix_set(m,0,0,1.23);// 设置矩阵m的(1,2)位置为3.45gsl_matrix_set(m,1,2,3.45);// 获取(0,0...
gsl_matrix *pseudo_inverse(gsl_matrix* input){intm = input->size1;intn = input->size2; gsl_matrix *U =gsl_matrix_calloc(m,n); gsl_matrix_memcpy(U, input); gsl_matrix *V =gsl_matrix_calloc(n,n); gsl_vector *sigma = gsl_vector_calloc(n); gsl_vector *tmp = gsl_vector_callo...
printf("\nm'*m=\n");PrintMatrix(OP);// freegsl_matrix_free(m);gsl_matrix_free(I);gsl_vector_free(v);gsl_matrix_free(t);gsl_matrix_free(OP);return0;}voidPrintMatrix(gsl_matrix*m){inti,j;for(i=0;i<m->size1;++i){for(j=0;j<m->size2;++j)printf("%f ",gsl_matrix_get...
("%f",gsl_matrix_get(A,i,j));}printf("\n");}// 解Ax=bgsl_vector*x=gsl_vector_alloc(3);// 解存放的地方gsl_linalg_LU_solve(A,p,b,x);for(i=0;i<3;i++){printf("x_%d = %g\n",i,gsl_vector_get(x,i));}gsl_matrix_free(A);gsl_vector_free(b);gsl_vector_free(x);...
gsl_permutation_free(px); return temp; } 讲解 gsl_linalg_LU_decomp 函数原型: int gsl_linalg_LU_decomp(gsl_matrix *A,gsl_permutation *p,int *signum) 1.这个函数将矩阵A进行LU分解。 在线性代数中,LU分解是矩阵分解的一种,可以将一个矩阵分解为一个下三角矩阵和一个上三角矩阵的乘积(有时是它们和...
在分配内存空间后,需要使用合适的数值或算法来填充Jacobi矩阵。可以使用GSL提供的函数,如gsl_matrix_set()来设置矩阵元素的值。 在使用完Jacobi矩阵后,需要及时释放内存空间,以避免内存泄漏。可以使用GSL提供的函数,如gsl_matrix_free()来释放矩阵对象所占用的内存空间。
gsl_matrix_free (actual_solution); // free memory allocated for the solution matrix gsl_multiroot_function_free (f); // free memory allocated for the multiroot function object gsl_vector_free (x); // free memory allocated for the initial guess vector gsl_multiroot_fdfsolver_free (solver);...
GSL is free software, you can redistribute it and/or modify it under the terms of the GNU General Public License. The GNU General Public License does not permit this software to be redistributed in proprietary programs. This library is distributed in the hope that it will be useful, but ...