poissonmatlab 一维和二维 有限元程序

poisson（matlab） 一维和二维 有限元程序，自己初学时写的，相对比较简单，适用于初学者.

function A=assemble_matrix_volume_in_1D（function_cmatrix_sizePTTb...
                       Gauss_coefficient_reference_1DGauss_point_reference_1D...
                       number_of_elementsnumber_of_local_basisbasis_typeder）
% PPT P78 and P61
A=sparse（matrix_size（1）matrix_size（2））;%稀疏矩阵

for n=1:number_of_elements
    
    vertices=P（:T（:n））;%第n个单元的网格节点坐标
    [Gauss_weightGauss_point]=generate_Gauss_local_1D（Gauss_coefficient_reference_1DGauss_point_reference_1Dvertices（1）vertices（2））;
    %生成局部高斯节点及其相应权重
    
    for alpha=1:number_of_local_basis
       for beta=1:number_of_local_basis
      
           int_value=Gauss_vol_int_trial_test（function_cGauss_weightGauss_pointverticesbasis_typealphaderbasis_typebetader）; 
                         
           A（Tb（betan）Tb（alphan））=A（Tb（betan）Tb（alphan））+int_value;
   
        end
    end
end                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-11-01 10:48  Possion\
     目录           0  2018-11-01 10:48  Possion\Poisson_1D\
     文件         737  2017-12-13 07:55  Possion\Poisson_1D\generate_Gauss_local_1D.m
     文件         304  2017-12-26 12:27  Possion\Poisson_1D\FE_function_1D.m
     文件        1103  2017-12-13 07:11  Possion\Poisson_1D\generate_Gauss_reference_1D.m
     文件          51  2017-12-26 12:45  Possion\Poisson_1D\exact_x.m
     文件          59  2017-12-14 14:37  Possion\Poisson_1D\function_c.m
     文件          75  2017-12-27 07:46  Possion\Poisson_1D\read me.txt
     文件         117  2017-12-26 12:10  Possion\Poisson_1D\exact.m
     文件         157  2017-12-09 15:47  Possion\Poisson_1D\function_f.m
     文件         170  2017-12-27 00:43  Possion\Poisson_1D\generate_PT.m
     文件         175  2017-12-27 00:24  Possion\Poisson_1D\generate_boundarynodes.m
     文件         212  2017-12-26 13:57  Possion\Poisson_1D\error_test.m
     文件         249  2017-12-15 03:19  Possion\Poisson_1D\function_g.m
     文件         264  2018-01-10 01:16  Possion\Poisson_1D\test_1.m
     文件         334  2017-12-27 09:23  Possion\Poisson_1D\generate_local_basis_number.m
     文件         347  2017-12-26 12:04  Possion\Poisson_1D\treat_Neumann_boundary.m
     文件         390  2017-12-26 11:55  Possion\Poisson_1D\Gauss_vol_int_test.m
     文件         428  2017-12-27 01:20  Possion\Poisson_1D\treat_Dirichlet_boundary.m
     文件         469  2017-12-26 11:58  Possion\Poisson_1D\treat_Robin_boundary.m
     文件         521  2017-12-27 05:49  Possion\Poisson_1D\generate_PbTb.m
     文件         818  2017-12-26 13:52  Possion\Poisson_1D\Gauss_vol_int_trial_test.m
     文件         853  2017-12-27 08:55  Possion\Poisson_1D\compute_Hs_error_1D.m
     文件         990  2018-01-10 01:05  Possion\Poisson_1D\compute_inf_error_1D.m
     文件        1432  2017-12-12 13:09  Possion\Poisson_1D\FE_local_basis_1D.m
     文件        2586  2018-01-10 01:15  Possion\Poisson_1D\Poisson_solver_1D.m
     文件        3405  2017-12-26 11:38  Possion\Poisson_1D\assemble_vector_volume_in_1D.m
     文件        3543  2017-12-26 13:47  Possion\Poisson_1D\assemble_matrix_volume_in_1D.m
     目录           0  2018-11-01 10:48  Possion\Poisson_2D\
     目录           0  2018-11-01 10:48  Possion\Poisson_2D\Poisson_2D_Dirichlet\
     文件         208  2017-12-27 09:25  Possion\Poisson_2D\Poisson_2D_Dirichlet\error_test helimin.m
............此处省略112个文件信息