Matlab - 将矩阵提升到幂的维度不正确 [英] Matlab - Incorrect dimensions for raising a matrix to a power

问题描述

假设我们有 a=60 和 B=60.我正在尝试计算这个区域:

Suppose we have a=60 and B=60. I am trying to calculate this area:

当我尝试这个时:

W = ((u^2)* cot(B) + (v^2 * cot(a))/8;

我收到此错误:

将矩阵提升到幂的维度不正确.检查矩阵是否为方阵，幂是否为标量.要执行逐元素矩阵幂，使用'.^'.

Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To perform elementwise matrix powers, use '.^'.

如何正确使用u^2?

推荐答案

如果 u 和 v 是向量，你应该写 u.^2 和 v.^2 代替(元素操作符).当你写 u^2 意味着 u * u 而这并不意味着 u 不是一个平方矩阵.

If u and v are a vector, you should write u.^2 and v.^2 instead (an element-wise operator). When you write u^2 means u * u and it does not mean when u is not a squared matrix.

但是，如果它们是向量，则不用于计算W的值.

However, if they are vector, it is not meant for computing the value of W.

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