Convert this C program into matlab. Please help. Stuck very badly as con[i][j] matrix is showing decimal nos. like 23.33(which is obviously not accepted in indexing in matlab).That error is showing in MG_matrix[con[eltn][i] - 1][con[eltn][j] - 1]

Question

Virajan Verma 2018-11-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429982-convert-this-c-program-into-matlab-please-help-stuck-very-badly-as-con-i-j-matrix-is-showing-dec

回答： Virajan Verma 2018-11-16

for (ip=0;ip<9;ip++)
{
Ms3_matrix[i][j]=Ms3_matrix[i][j]+w3(epsilon3)*J*NTM_matrix[i][ip]*N_matrix[ip][j];   
Mte3_matrix[i][j]=Ms3_matrix[i][j];                                                 
}
 for (i = 0; i <27; i++)
 {
	    for (j = 0; j < 27; j++)
          {
                Mte6_matrix[i][j]=0;
}
}
 for (i = 0; i <27; i++)
         {
	    for (j = 0; j < 27; j++)
          {
                Mte_matrix[i][j]=0;
/*  *****************************Total Element Mass Matrix or Local Mass matrix(Kte_matrix)*************************** */
		Mte_matrix[i][j]= Mte_matrix[i][j]+Mte3_matrix[i][j]+Mte6_matrix[i][j];
	      }
}
for (i = 0; i <30; i++)
	{
	  for (j = 0; j <27; j++)
        con[i][j]=58*(j/3)+j+2*i+1
    }
}
for (i = 0; i <27; i++)
	{
	  for (j = 0; j <27; j++)
	    MG_matrix[con[eltn][i] - 1][con[eltn][j] - 1] = Mte_matrix[i][j];	(ERROR HERE)
	}

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Virajan Verma 2018-11-15

在 MATLAB Online 中打开

for ip=1:9         %%DOUBT
Ms3_matrix(i,j)=Ms3_matrix(i,j)+w3(epsilon3)*J*NTM_matrix(i,ip)*N_matrix(ip,j);   
Mte3_matrix(i,j)=Ms3_matrix(i,j);    
end
for i=1:27
     for j=1:27
       Mte_matrix(i,j)=0;
     end
 end
 
  for i=1:27
     for j=1:27
       Mte6_matrix(i,j)=0;
     end
 end
for ip=1:27
                    Mte_matrix(i,j)= Mte_matrix(i,j)+Mte3_matrix(i,j)+Mte6_matrix(i,j);
        end
        for i=1:30
    for j=1:27
        conn(i,j)=58*(j/3)+j+2*i+1
    end
end
     eltn=30;
for i=1:27
     for j=1:27
  
	    MG_matrix(conn(eltn,i) -1,conn(eltn,j)-1)= Mte_matrix(i,j);

Virajan Verma 2018-11-15

Please help me get over this. M stuck in this for the past 10 days. I really need this fixed ASAP

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Answer 1

Torsten 2018-11-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429982-convert-this-c-program-into-matlab-please-help-stuck-very-badly-as-con-i-j-matrix-is-showing-dec#answer_347093

编辑：Torsten 2018-11-15

for i=1:30
  for j=1:27
    conn(i,j) = 58*floor((j-1)/3)+(j-1)+2*(i-1)+1
  end
end
for i=1:27
  for j=1:27
     MG_matrix(conn(eltn,i) ,conn(eltn,j))= Mte_matrix(i,j);
  end
end  