techwinder 使用的 C++ 中的特定数学函数

Question

In this answer @techwinder used in his-own code functions:

• matMult() with 6 args where are this function from?

• Also where I could find functions: invert33() , invert44() , inverseMatrixLapack() , and matMult() , which are used in @techwinder code?

Answer 1

Note: I think you should have asked himself:) maybe this will be closed or moved to stackoverflow...

Just to shed some light on the subject, he mentions lapack , in the code.

You can find out how to compute the inverse matrix with lapack here , and matrix-matrix multiplication can be computed with dgemm

He has some specialized code for small matrix, but that is not necessary if you want a simple solution.