java - 如何在 Java 中创建任意大小的单位矩阵？

Question

是否有一个实用程序可以在 Java 中创建指定大小的单位矩阵？

Answer 1

尝试Apache Commons Math for commonly used linear algebra :

// Set dimension to the size of the square matrix that you would like
// Example, this will make a 3x3 matrix with ones on the diagonal and
// zeros elsewhere.
int dimension = 3;
RealMatrix identity = RealMatrix.createRealIdentityMatrix(dimension);