Question

我试图从Matlab中生成的m * n数据表中选择一个特定的数组。它显示索引超过矩阵维度的错误。有关详细信息，请查看以下代码：

t_res = 0.2;
c_angle = 360/30;
iact = 0.1;
V = 12;
p = 1;

for p=1:length(p),
for p=1:5,
    Time = p*t_res;
    Angle = Time*c_angle/2;
    if (p == 1)
        delt_i = 0; 
    else
        delt_i = 0.5* t_res* V /L_obt;
    end
 iact = iact+delt_i;

 [~, ~, raw] = xlsread('F:\Pradeep\Matlab\data1.xlsx','Sheet3','A2:D11');
 data = reshape([raw{:}],size(raw)); 
 Current = data(:,1);
 Angle1 = data(:,2);
 Torque = data(:,3);
 Fluxlinkage = data(:,4);


 F = scatteredInterpolant(Current,Angle1,Fluxlinkage);
 Fluxlinkage = F(iact,Angle);
 L_obt = Fluxlinkage/iact; 
 F = scatteredInterpolant(Current,Angle1,Torque);
 Torque = F(iact,Angle);


Table = [p' Time' Angle' iact' delt_i' abs(Torque)' Fluxlinkage' L_obt'];
fprintf('%d\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\n', Table');

end
p=p+1;
Table(3,5);
end

Answer 1

首先，在第11行你说：

delt_i = 0.5* t_res* V /L_obt;

但L_obt似乎没有被定义。

然后，第38行的说明有问题：

Table(3,5);

由于Table是一维数组（一行包含8个值），因此您只需要一个1到8之间的数字，例如Table(3)或Table(5)。在二维数组的情况下，Table(3,5)意味着您需要第3行和第5列中的值。

Answer 2

以下是您的代码的重组版本。我把那些不需要进入循环的东西移出了它。并对你真正想要做的事做了一些假设。有关更改的说明，请参阅下面的注释。注意：我无法对此进行测试，因为我没有您的电子表格，但至少应该让您更接近。

t_res = 0.2;
c_angle = 360/30;
iact = 0.1;
V = 12;
%p = 1;  %This does nothing since your iterate over p in the loop

%These things don't depend n "p" so don't put them in the loop
[~, ~, raw] = xlsread('F:\Pradeep\Matlab\data1.xlsx','Sheet3','A2:D11');
data = reshape([raw{:}],size(raw));
Current = data(:,1);
Angle1 = data(:,2);
Torque = data(:,3);
Fluxlinkage = data(:,4);
F1 = scatteredInterpolant(Current,Angle1,Fluxlinkage);
F2 = scatteredInterpolant(Current,Angle1,Torque);

%I assume you want to build your var "Table" in the loop ... not to be
%confused with an actaul Matlab type "table" ... so pre-allocate
Table = zeros(5,8);

for p=1:5,
    Time = p*t_res;
    Angle = Time*c_angle/2;
    if (p == 1)
        delt_i = 0;
    else
        delt_i = 0.5* t_res* V /L_obt;   
    end
    iact = iact+delt_i;

    Fluxlinkage = F1(iact,Angle);
    L_obt = Fluxlinkage/iact;
    Torque = F2(iact,Angle);    

    %You were just overwritning the same row again and again ... so create
    %a new row for each results.
    Table(p,:) = [p Time Angle iact delt_i abs(Torque) Fluxlinkage L_obt];
    %Print the new row.
    fprintf('%d\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\t\t %f\n', Table(p,:));

end
%Not sure what this is for ... since the output is surpressed by the
%semi-colon ???
Table(3,5);

从表构建数组

2 个答案: