Matlab:如何计算矩阵的逆 [英] Matlab: How to compute the inverse of a matrix

问题描述

我想找到图片中给定的T倒数.第一张图片是矩阵T，另一张图片是T逆.

I want to find the T inverse as given in the picture. The first picture is the matrix T and the other is T inverse.

I = eye(3);
T = [I/2, (j/2)*I, 0;
     I/2,  (-j/2)*I, 0;
     0,0,I];

使用horzcat时出错 CAT参数的尺寸不一致.

Error using horzcat CAT arguments dimensions are not consistent.

然后我尝试使用I = eye(2)并得到了相同的错误.正确的方法是什么?

Then I tried with I = eye(2) and got the same error. What is the proper way?

推荐答案

给出

I = eye(3);

您要使用以下方法乘以 逐元素 .* 和A(确保使用虚数单位 1j 而不是未定义的变量j)

you want to multiply element-wise using .* with A (make sure you use the imaginary unit 1j and not an undefined variable j)

A = [1/2, (1j/2), 0;
     1/2,  (-1j/2), 0;
     0,0,1];

获取T

T = A.*I

但是除此之外，您实际上还想将A与常数C = I = 1

But apart from that it feels like you actually want to multiply A with a constant C = I = 1

T = A.*1

通过 inv erse 功能:

The inverse you obtain with the inverse function:

Tinv = inv(T)

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