Hi,

I need to take a matrix as an output into MATLAB(I am writing a mex file). Does anyone know how to do it? I was trying to transform the matrix class into a regular C array so that I can output it, but can not figure out how to do it....

Thank you very much!

Eigen matrix is stored continuously, the storage order is row-major or column-major, so you can directly use the pointer, &m(0,0)

there is also the .data() method to get the address of the first entry.