本征3方阵除以列阵

我想把一个正方形数组的每一行都分开( b )通过列数组的转置( a

测试代码也处于 godbolt.org ,其中安装了eigen 3库。

// before (a)
2
2
2
// before (b)
2 2 2
4 4 4
6 6 6
// after
1 1 1
2 2 2
3 3 3

#include <Eigen/Eigen>
#include <iostream>
using namespace Eigen;

int main() {
    ArrayXXf a(3, 1);
    a << 2, 2, 2;
    ArrayXXf b(3, 3);
    b << 2, 2, 2, 4, 4, 4, 6, 6, 6;
    std::cout << a << "\n";
    std::cout << b << "\n";
    b.rowwise() /= a.transpose();
    std::cout << b << "\n";
}

...
error: static assertion failed: YOU_TRIED_CALLING_A_VECTOR_METHOD_ON_A_MATRIX
...

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Eigen: Divide each row by last row