Plotting eigenvalues of a 4*4 matrix: In an assignment A(I) = B, the number of elements in B and I must be the same.

7 次查看（过去 30 天）

显示更早的评论

ZAHID MALIK 2023-4-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1947903-plotting-eigenvalues-of-a-4-4-matrix-in-an-assignment-a-i-b-the-number-of-elements-in-b-and-i

评论： ZAHID MALIK 2023-4-16

p=1;

for k=0.1:.1:3

A=[0 0 0 exp(-i*k);exp(i*k) 0 0 0;0 exp(i*k) 0 0;0 0 exp(i*k) 0];

C=eig(A);

x(p)=k;

y(p)=C;

p=p+1;

end

plot(x,y)

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Bhanu Prakash 2023-4-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1947903-plotting-eigenvalues-of-a-4-4-matrix-in-an-assignment-a-i-b-the-number-of-elements-in-b-and-i#answer_1216523

在 MATLAB Online 中打开

Hi Zahid,

As per my understanding, you are trying to plot the eigen values of a 4x4 matrix and are facing some error with it.

To perform an assignment operation, the dimensions of the matrices must be equal. For any given iteration, the matrices "C" & "y" have the dimensions 4x1 & 1x1 respectively, making the dimensions incompatible.

One workaround for this, is to change the indices of the matrix "y" as shown below:

y(:,p)=C;

You can refer to the documentation of array indexing, for more info:

Array Indexing - MATLAB & Simulink - MathWorks India

Hope this answer helps you.

Thanks,

Bhanu Prakash.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

ZAHID MALIK 2023-4-16

It worked, thank you so much

请先登录，再进行评论。

请先登录，再回答此问题。

类别

MATLAB External Language Interfaces Other languages Octave

在 Help Center 和 File Exchange 中查找有关 Octave 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by