I have found something:
get the hb_io matlab library from internet, after some changes, you can get column row and value vectors, use sparse function of matlab and build a sparse matrix out of them, then use full function of matlab to convert sparse into normal matrix and get a real stiffness...
I made a mode analysis with ansys and I want to rip stiffness matrix of the system, then I will use it in matlap. ansys gives stiffness matrix in Harwell-Boeing format. How can I import it into matlab?
